diff --git a/applypatch/applypatch.c b/applypatch/applypatch.c
index 00004e9..7b8a010 100644
--- a/applypatch/applypatch.c
+++ b/applypatch/applypatch.c
@@ -39,7 +39,8 @@
                           const char* source_filename,
                           const char* target_filename,
                           const uint8_t target_sha1[SHA_DIGEST_SIZE],
-                          size_t target_size);
+                          size_t target_size,
+                          const Value* bonus_data);
 
 static int mtd_partitions_scanned = 0;
 
@@ -324,7 +325,7 @@
 // Save the contents of the given FileContents object under the given
 // filename.  Return 0 on success.
 int SaveFileContents(const char* filename, const FileContents* file) {
-    int fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC);
+    int fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC, S_IRUSR | S_IWUSR);
     if (fd < 0) {
         printf("failed to open \"%s\" for write: %s\n",
                filename, strerror(errno));
@@ -617,7 +618,8 @@
                size_t target_size,
                int num_patches,
                char** const patch_sha1_str,
-               Value** patch_data) {
+               Value** patch_data,
+               Value* bonus_data) {
     printf("\napplying patch to %s\n", source_filename);
 
     if (target_filename[0] == '-' &&
@@ -699,7 +701,7 @@
     int result = GenerateTarget(&source_file, source_patch_value,
                                 &copy_file, copy_patch_value,
                                 source_filename, target_filename,
-                                target_sha1, target_size);
+                                target_sha1, target_size, bonus_data);
     free(source_file.data);
     free(copy_file.data);
 
@@ -713,7 +715,8 @@
                           const char* source_filename,
                           const char* target_filename,
                           const uint8_t target_sha1[SHA_DIGEST_SIZE],
-                          size_t target_size) {
+                          size_t target_size,
+                          const Value* bonus_data) {
     int retry = 1;
     SHA_CTX ctx;
     int output;
@@ -843,7 +846,7 @@
             strcpy(outname, target_filename);
             strcat(outname, ".patch");
 
-            output = open(outname, O_WRONLY | O_CREAT | O_TRUNC);
+            output = open(outname, O_WRONLY | O_CREAT | O_TRUNC, S_IRUSR | S_IWUSR);
             if (output < 0) {
                 printf("failed to open output file %s: %s\n",
                        outname, strerror(errno));
@@ -867,7 +870,7 @@
         } else if (header_bytes_read >= 8 &&
                    memcmp(header, "IMGDIFF2", 8) == 0) {
             result = ApplyImagePatch(source_to_use->data, source_to_use->size,
-                                     patch, sink, token, &ctx);
+                                     patch, sink, token, &ctx, bonus_data);
         } else {
             printf("Unknown patch file format\n");
             return 1;
diff --git a/applypatch/applypatch.h b/applypatch/applypatch.h
index fb58843..d1a0232 100644
--- a/applypatch/applypatch.h
+++ b/applypatch/applypatch.h
@@ -55,7 +55,8 @@
                size_t target_size,
                int num_patches,
                char** const patch_sha1_str,
-               Value** patch_data);
+               Value** patch_data,
+               Value* bonus_data);
 int applypatch_check(const char* filename,
                      int num_patches,
                      char** const patch_sha1_str);
@@ -79,7 +80,8 @@
 // imgpatch.c
 int ApplyImagePatch(const unsigned char* old_data, ssize_t old_size,
                     const Value* patch,
-                    SinkFn sink, void* token, SHA_CTX* ctx);
+                    SinkFn sink, void* token, SHA_CTX* ctx,
+                    const Value* bonus_data);
 
 // freecache.c
 int MakeFreeSpaceOnCache(size_t bytes_needed);
diff --git a/applypatch/imgdiff.c b/applypatch/imgdiff.c
index 6b9ebee..05c4f25 100644
--- a/applypatch/imgdiff.c
+++ b/applypatch/imgdiff.c
@@ -111,6 +111,14 @@
  *
  * After the header there are 'chunk count' bsdiff patches; the offset
  * of each from the beginning of the file is specified in the header.
+ *
+ * This tool can take an optional file of "bonus data".  This is an
+ * extra file of data that is appended to chunk #1 after it is
+ * compressed (it must be a CHUNK_DEFLATE chunk).  The same file must
+ * be available (and passed to applypatch with -b) when applying the
+ * patch.  This is used to reduce the size of recovery-from-boot
+ * patches by combining the boot image with recovery ramdisk
+ * information that is stored on the system partition.
  */
 
 #include <errno.h>
@@ -772,21 +780,45 @@
 }
 
 int main(int argc, char** argv) {
-  if (argc != 4 && argc != 5) {
-    usage:
-    printf("usage: %s [-z] <src-img> <tgt-img> <patch-file>\n",
-            argv[0]);
-    return 2;
-  }
-
   int zip_mode = 0;
 
-  if (strcmp(argv[1], "-z") == 0) {
+  if (argc >= 2 && strcmp(argv[1], "-z") == 0) {
     zip_mode = 1;
     --argc;
     ++argv;
   }
 
+  size_t bonus_size = 0;
+  unsigned char* bonus_data = NULL;
+  if (argc >= 3 && strcmp(argv[1], "-b") == 0) {
+    struct stat st;
+    if (stat(argv[2], &st) != 0) {
+      printf("failed to stat bonus file %s: %s\n", argv[2], strerror(errno));
+      return 1;
+    }
+    bonus_size = st.st_size;
+    bonus_data = malloc(bonus_size);
+    FILE* f = fopen(argv[2], "rb");
+    if (f == NULL) {
+      printf("failed to open bonus file %s: %s\n", argv[2], strerror(errno));
+      return 1;
+    }
+    if (fread(bonus_data, 1, bonus_size, f) != bonus_size) {
+      printf("failed to read bonus file %s: %s\n", argv[2], strerror(errno));
+      return 1;
+    }
+    fclose(f);
+
+    argc -= 2;
+    argv += 2;
+  }
+
+  if (argc != 4) {
+    usage:
+    printf("usage: %s [-z] [-b <bonus-file>] <src-img> <tgt-img> <patch-file>\n",
+            argv[0]);
+    return 2;
+  }
 
   int num_src_chunks;
   ImageChunk* src_chunks;
@@ -909,6 +941,8 @@
   // Compute bsdiff patches for each chunk's data (the uncompressed
   // data, in the case of deflate chunks).
 
+  DumpChunks(src_chunks, num_src_chunks);
+
   printf("Construct patches for %d chunks...\n", num_tgt_chunks);
   unsigned char** patch_data = malloc(num_tgt_chunks * sizeof(unsigned char*));
   size_t* patch_size = malloc(num_tgt_chunks * sizeof(size_t));
@@ -923,6 +957,13 @@
         patch_data[i] = MakePatch(src_chunks, tgt_chunks+i, patch_size+i);
       }
     } else {
+      if (i == 1 && bonus_data) {
+        printf("  using %d bytes of bonus data for chunk %d\n", bonus_size, i);
+        src_chunks[i].data = realloc(src_chunks[i].data, src_chunks[i].len + bonus_size);
+        memcpy(src_chunks[i].data+src_chunks[i].len, bonus_data, bonus_size);
+        src_chunks[i].len += bonus_size;
+     }
+
       patch_data[i] = MakePatch(src_chunks+i, tgt_chunks+i, patch_size+i);
     }
     printf("patch %3d is %d bytes (of %d)\n",
diff --git a/applypatch/imgpatch.c b/applypatch/imgpatch.c
index e3ee80a..3a1df38 100644
--- a/applypatch/imgpatch.c
+++ b/applypatch/imgpatch.c
@@ -37,7 +37,8 @@
  */
 int ApplyImagePatch(const unsigned char* old_data, ssize_t old_size,
                     const Value* patch,
-                    SinkFn sink, void* token, SHA_CTX* ctx) {
+                    SinkFn sink, void* token, SHA_CTX* ctx,
+                    const Value* bonus_data) {
     ssize_t pos = 12;
     char* header = patch->data;
     if (patch->size < 12) {
@@ -123,6 +124,12 @@
             // Decompress the source data; the chunk header tells us exactly
             // how big we expect it to be when decompressed.
 
+            // Note: expanded_len will include the bonus data size if
+            // the patch was constructed with bonus data.  The
+            // deflation will come up 'bonus_size' bytes short; these
+            // must be appended from the bonus_data value.
+            size_t bonus_size = (i == 1 && bonus_data != NULL) ? bonus_data->size : 0;
+
             unsigned char* expanded_source = malloc(expanded_len);
             if (expanded_source == NULL) {
                 printf("failed to allocate %d bytes for expanded_source\n",
@@ -153,13 +160,19 @@
                 printf("source inflation returned %d\n", ret);
                 return -1;
             }
-            // We should have filled the output buffer exactly.
-            if (strm.avail_out != 0) {
-                printf("source inflation short by %d bytes\n", strm.avail_out);
+            // We should have filled the output buffer exactly, except
+            // for the bonus_size.
+            if (strm.avail_out != bonus_size) {
+                printf("source inflation short by %d bytes\n", strm.avail_out-bonus_size);
                 return -1;
             }
             inflateEnd(&strm);
 
+            if (bonus_size) {
+                memcpy(expanded_source + (expanded_len - bonus_size),
+                       bonus_data->data, bonus_size);
+            }
+
             // Next, apply the bsdiff patch (in memory) to the uncompressed
             // data.
             unsigned char* uncompressed_target_data;
diff --git a/applypatch/main.c b/applypatch/main.c
index 7025a2e..f61db5d 100644
--- a/applypatch/main.c
+++ b/applypatch/main.c
@@ -100,6 +100,21 @@
 }
 
 int PatchMode(int argc, char** argv) {
+    Value* bonus = NULL;
+    if (argc >= 3 && strcmp(argv[1], "-b") == 0) {
+        FileContents fc;
+        if (LoadFileContents(argv[2], &fc, RETOUCH_DONT_MASK) != 0) {
+            printf("failed to load bonus file %s\n", argv[2]);
+            return 1;
+        }
+        bonus = malloc(sizeof(Value));
+        bonus->type = VAL_BLOB;
+        bonus->size = fc.size;
+        bonus->data = (char*)fc.data;
+        argc -= 2;
+        argv += 2;
+    }
+
     if (argc < 6) {
         return 2;
     }
@@ -120,7 +135,7 @@
     }
 
     int result = applypatch(argv[1], argv[2], argv[3], target_size,
-                            num_patches, sha1s, patches);
+                            num_patches, sha1s, patches, bonus);
 
     int i;
     for (i = 0; i < num_patches; ++i) {
@@ -130,6 +145,10 @@
             free(p);
         }
     }
+    if (bonus) {
+        free(bonus->data);
+        free(bonus);
+    }
     free(sha1s);
     free(patches);
 
@@ -163,7 +182,7 @@
     if (argc < 2) {
       usage:
         printf(
-            "usage: %s <src-file> <tgt-file> <tgt-sha1> <tgt-size> "
+            "usage: %s [-b <bonus-file>] <src-file> <tgt-file> <tgt-sha1> <tgt-size> "
             "[<src-sha1>:<patch> ...]\n"
             "   or  %s -c <file> [<sha1> ...]\n"
             "   or  %s -s <bytes>\n"
diff --git a/etc/init.rc b/etc/init.rc
index 89a161e..abc7b31 100644
--- a/etc/init.rc
+++ b/etc/init.rc
@@ -1,3 +1,5 @@
+import /init.recovery.${ro.hardware}.rc
+
 on early-init
     start ueventd
 
diff --git a/install.cpp b/install.cpp
index 4d73aa9..b8f4781 100644
--- a/install.cpp
+++ b/install.cpp
@@ -180,6 +180,12 @@
 //
 //  "{64,0xc926ad21,{1795090719,...,-695002876},{-857949815,...,1175080310}}"
 //
+// For key versions newer than the original 2048-bit e=3 keys
+// supported by Android, the string is preceded by a version
+// identifier, eg:
+//
+//  "v2 {64,0xc926ad21,{1795090719,...,-695002876},{-857949815,...,1175080310}}"
+//
 // (Note that the braces and commas in this example are actual
 // characters the parser expects to find in the file; the ellipses
 // indicate more numbers omitted from this example.)
@@ -206,7 +212,23 @@
             ++*numKeys;
             out = (RSAPublicKey*)realloc(out, *numKeys * sizeof(RSAPublicKey));
             RSAPublicKey* key = out + (*numKeys - 1);
-            if (fscanf(f, " { %i , 0x%x , { %u",
+
+            char start_char;
+            if (fscanf(f, " %c", &start_char) != 1) goto exit;
+            if (start_char == '{') {
+                // a version 1 key has no version specifier.
+                key->exponent = 3;
+            } else if (start_char == 'v') {
+                int version;
+                if (fscanf(f, "%d {", &version) != 1) goto exit;
+                if (version == 2) {
+                    key->exponent = 65537;
+                } else {
+                    goto exit;
+                }
+            }
+
+            if (fscanf(f, " %i , 0x%x , { %u",
                        &(key->len), &(key->n0inv), &(key->n[0])) != 3) {
                 goto exit;
             }
@@ -237,6 +259,8 @@
                 LOGE("unexpected character between keys\n");
                 goto exit;
             }
+
+            LOGI("read key e=%d\n", key->exponent);
         }
     }
 
@@ -253,7 +277,7 @@
 static int
 really_install_package(const char *path, int* wipe_cache)
 {
-    ui->SetBackground(RecoveryUI::INSTALLING);
+    ui->SetBackground(RecoveryUI::INSTALLING_UPDATE);
     ui->Print("Finding update package...\n");
     ui->SetProgressType(RecoveryUI::INDETERMINATE);
     LOGI("Update location: %s\n", path);
diff --git a/install.h b/install.h
index 1943f02..2ada529 100644
--- a/install.h
+++ b/install.h
@@ -23,7 +23,7 @@
 extern "C" {
 #endif
 
-enum { INSTALL_SUCCESS, INSTALL_ERROR, INSTALL_CORRUPT };
+enum { INSTALL_SUCCESS, INSTALL_ERROR, INSTALL_CORRUPT, INSTALL_NONE };
 // Install the package specified by root_path.  If INSTALL_SUCCESS is
 // returned and *wipe_cache is true on exit, caller should wipe the
 // cache partition.
diff --git a/minui/Android.mk b/minui/Android.mk
index 4c4d7c7..285ac62 100644
--- a/minui/Android.mk
+++ b/minui/Android.mk
@@ -9,10 +9,14 @@
 
 LOCAL_MODULE := libminui
 
-ifeq ($(TARGET_RECOVERY_PIXEL_FORMAT),"RGBX_8888")
+# This used to compare against values in double-quotes (which are just
+# ordinary characters in this context).  Strip double-quotes from the
+# value so that either will work.
+
+ifeq ($(subst ",,$(TARGET_RECOVERY_PIXEL_FORMAT)),RGBX_8888)
   LOCAL_CFLAGS += -DRECOVERY_RGBX
 endif
-ifeq ($(TARGET_RECOVERY_PIXEL_FORMAT),"BGRA_8888")
+ifeq ($(subst ",,$(TARGET_RECOVERY_PIXEL_FORMAT)),BGRA_8888)
   LOCAL_CFLAGS += -DRECOVERY_BGRA
 endif
 
diff --git a/minui/graphics.c b/minui/graphics.c
index 296e2e0..88572a8 100644
--- a/minui/graphics.c
+++ b/minui/graphics.c
@@ -44,6 +44,8 @@
 #define PIXEL_SIZE   2
 #endif
 
+#define NUM_BUFFERS 2
+
 typedef struct {
     GGLSurface texture;
     unsigned cwidth;
@@ -54,7 +56,7 @@
 static GRFont *gr_font = 0;
 static GGLContext *gr_context = 0;
 static GGLSurface gr_font_texture;
-static GGLSurface gr_framebuffer[2];
+static GGLSurface gr_framebuffer[NUM_BUFFERS];
 static GGLSurface gr_mem_surface;
 static unsigned gr_active_fb = 0;
 static unsigned double_buffering = 0;
@@ -169,7 +171,7 @@
 static void set_active_framebuffer(unsigned n)
 {
     if (n > 1 || !double_buffering) return;
-    vi.yres_virtual = vi.yres * PIXEL_SIZE;
+    vi.yres_virtual = vi.yres * NUM_BUFFERS;
     vi.yoffset = n * vi.yres;
     vi.bits_per_pixel = PIXEL_SIZE * 8;
     if (ioctl(gr_fb_fd, FBIOPUT_VSCREENINFO, &vi) < 0) {
@@ -242,6 +244,22 @@
     return x;
 }
 
+void gr_texticon(int x, int y, gr_surface icon) {
+    GGLContext* gl = gr_context;
+
+    gl->bindTexture(gl, (GGLSurface*) icon);
+    gl->texEnvi(gl, GGL_TEXTURE_ENV, GGL_TEXTURE_ENV_MODE, GGL_REPLACE);
+    gl->texGeni(gl, GGL_S, GGL_TEXTURE_GEN_MODE, GGL_ONE_TO_ONE);
+    gl->texGeni(gl, GGL_T, GGL_TEXTURE_GEN_MODE, GGL_ONE_TO_ONE);
+    gl->enable(gl, GGL_TEXTURE_2D);
+
+    int w = gr_get_width(icon);
+    int h = gr_get_height(icon);
+
+    gl->texCoord2i(gl, -x, -y);
+    gl->recti(gl, x, y, x+gr_get_width(icon), y+gr_get_height(icon));
+}
+
 void gr_fill(int x, int y, int w, int h)
 {
     GGLContext *gl = gr_context;
diff --git a/minui/minui.h b/minui/minui.h
index 74da4e9..767ffcb 100644
--- a/minui/minui.h
+++ b/minui/minui.h
@@ -38,6 +38,7 @@
 void gr_color(unsigned char r, unsigned char g, unsigned char b, unsigned char a);
 void gr_fill(int x, int y, int w, int h);
 int gr_text(int x, int y, const char *s);
+ void gr_texticon(int x, int y, gr_surface icon);
 int gr_measure(const char *s);
 void gr_font_size(int *x, int *y);
 
@@ -71,6 +72,7 @@
 
 // Returns 0 if no error, else negative.
 int res_create_surface(const char* name, gr_surface* pSurface);
+int res_create_localized_surface(const char* name, gr_surface* pSurface);
 void res_free_surface(gr_surface surface);
 
 #ifdef __cplusplus
diff --git a/minui/resources.c b/minui/resources.c
index b437a87..af8720a 100644
--- a/minui/resources.c
+++ b/minui/resources.c
@@ -33,6 +33,8 @@
 
 #include "minui.h"
 
+extern char* locale;
+
 // libpng gives "undefined reference to 'pow'" errors, and I have no
 // idea how to convince the build system to link with -lm.  We don't
 // need this functionality (it's used for gamma adjustment) so provide
@@ -173,6 +175,154 @@
     return result;
 }
 
+static int matches_locale(const char* loc) {
+    if (locale == NULL) return 0;
+
+    printf("matching loc=[%s] vs locale=[%s]\n", loc, locale);
+
+    if (strcmp(loc, locale) == 0) return 1;
+
+    // if loc does *not* have an underscore, and it matches the start
+    // of locale, and the next character in locale *is* an underscore,
+    // that's a match.  For instance, loc == "en" matches locale ==
+    // "en_US".
+
+    int i;
+    for (i = 0; loc[i] != 0 && loc[i] != '_'; ++i);
+    if (loc[i] == '_') return 0;
+    printf("  partial match possible; i = %d\n", i);
+
+    return (strncmp(locale, loc, i) == 0 && locale[i] == '_');
+}
+
+int res_create_localized_surface(const char* name, gr_surface* pSurface) {
+    char resPath[256];
+    GGLSurface* surface = NULL;
+    int result = 0;
+    unsigned char header[8];
+    png_structp png_ptr = NULL;
+    png_infop info_ptr = NULL;
+
+    *pSurface = NULL;
+
+    snprintf(resPath, sizeof(resPath)-1, "/res/images/%s.png", name);
+    resPath[sizeof(resPath)-1] = '\0';
+    FILE* fp = fopen(resPath, "rb");
+    if (fp == NULL) {
+        result = -1;
+        goto exit;
+    }
+
+    size_t bytesRead = fread(header, 1, sizeof(header), fp);
+    if (bytesRead != sizeof(header)) {
+        result = -2;
+        goto exit;
+    }
+
+    if (png_sig_cmp(header, 0, sizeof(header))) {
+        result = -3;
+        goto exit;
+    }
+
+    png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
+    if (!png_ptr) {
+        result = -4;
+        goto exit;
+    }
+
+    info_ptr = png_create_info_struct(png_ptr);
+    if (!info_ptr) {
+        result = -5;
+        goto exit;
+    }
+
+    if (setjmp(png_jmpbuf(png_ptr))) {
+        result = -6;
+        goto exit;
+    }
+
+    png_init_io(png_ptr, fp);
+    png_set_sig_bytes(png_ptr, sizeof(header));
+    png_read_info(png_ptr, info_ptr);
+
+    size_t width = info_ptr->width;
+    size_t height = info_ptr->height;
+    size_t stride = 4 * width;
+
+    printf("image size is %d x %d\n", width, height);
+
+    int color_type = info_ptr->color_type;
+    int bit_depth = info_ptr->bit_depth;
+    int channels = info_ptr->channels;
+    printf("color_type %d bit_depth %d channels %d\n",
+           color_type, bit_depth, channels);
+
+    if (!(bit_depth == 8 &&
+          (channels == 1 && color_type == PNG_COLOR_TYPE_GRAY))) {
+        return -7;
+        printf("exiting -7\n");
+        goto exit;
+    }
+
+    unsigned char* row = malloc(width);
+    int y;
+    for (y = 0; y < height; ++y) {
+        png_read_row(png_ptr, row, NULL);
+        int w = (row[1] << 8) | row[0];
+        int h = (row[3] << 8) | row[2];
+        int len = row[4];
+        char* loc = row+5;
+
+        printf("row %d: %s %d x %d\n", y, loc, w, h);
+
+        if (y+1+h >= height || matches_locale(loc)) {
+            printf("  taking this one\n");
+
+            surface = malloc(sizeof(GGLSurface));
+            if (surface == NULL) {
+                result = -8;
+                goto exit;
+            }
+            unsigned char* pData = malloc(w*h);
+
+            surface->version = sizeof(GGLSurface);
+            surface->width = w;
+            surface->height = h;
+            surface->stride = w; /* Yes, pixels, not bytes */
+            surface->data = pData;
+            surface->format = GGL_PIXEL_FORMAT_A_8;
+
+            int i;
+            for (i = 0; i < h; ++i, ++y) {
+                png_read_row(png_ptr, row, NULL);
+                memcpy(pData + i*w, row, w);
+            }
+
+            *pSurface = (gr_surface) surface;
+            break;
+        } else {
+            printf("   skipping\n");
+            int i;
+            for (i = 0; i < h; ++i, ++y) {
+                png_read_row(png_ptr, row, NULL);
+            }
+        }
+    }
+
+exit:
+    png_destroy_read_struct(&png_ptr, &info_ptr, NULL);
+
+    if (fp != NULL) {
+        fclose(fp);
+    }
+    if (result < 0) {
+        if (surface) {
+            free(surface);
+        }
+    }
+    return result;
+}
+
 void res_free_surface(gr_surface surface) {
     GGLSurface* pSurface = (GGLSurface*) surface;
     if (pSurface) {
diff --git a/recovery.cpp b/recovery.cpp
index ce4358a..70817d3 100644
--- a/recovery.cpp
+++ b/recovery.cpp
@@ -54,6 +54,7 @@
   { "wipe_cache", no_argument, NULL, 'c' },
   { "show_text", no_argument, NULL, 't' },
   { "just_exit", no_argument, NULL, 'x' },
+  { "locale", required_argument, NULL, 'l' },
   { NULL, 0, NULL, 0 },
 };
 
@@ -62,6 +63,7 @@
 static const char *LOG_FILE = "/cache/recovery/log";
 static const char *LAST_LOG_FILE = "/cache/recovery/last_log";
 static const char *LAST_INSTALL_FILE = "/cache/recovery/last_install";
+static const char *LOCALE_FILE = "/cache/recovery/locale";
 static const char *CACHE_ROOT = "/cache";
 static const char *SDCARD_ROOT = "/sdcard";
 static const char *TEMPORARY_LOG_FILE = "/tmp/recovery.log";
@@ -69,6 +71,7 @@
 static const char *SIDELOAD_TEMP_DIR = "/tmp/sideload";
 
 RecoveryUI* ui = NULL;
+char* locale = NULL;
 
 /*
  * The recovery tool communicates with the main system through /cache files.
@@ -274,6 +277,18 @@
         }
     }
 
+    // Save the locale to cache, so if recovery is next started up
+    // without a --locale argument (eg, directly from the bootloader)
+    // it will use the last-known locale.
+    if (locale != NULL) {
+        LOGI("Saving locale \"%s\"\n", locale);
+        FILE* fp = fopen_path(LOCALE_FILE, "w");
+        fwrite(locale, 1, strlen(locale), fp);
+        fflush(fp);
+        fsync(fileno(fp));
+        check_and_fclose(fp, LOCALE_FILE);
+    }
+
     // Copy logs to cache so the system can find out what happened.
     copy_log_file(TEMPORARY_LOG_FILE, LOG_FILE, true);
     copy_log_file(TEMPORARY_LOG_FILE, LAST_LOG_FILE, false);
@@ -300,7 +315,7 @@
 
 static int
 erase_volume(const char *volume) {
-    ui->SetBackground(RecoveryUI::INSTALLING);
+    ui->SetBackground(RecoveryUI::ERASING);
     ui->SetProgressType(RecoveryUI::INDETERMINATE);
     ui->Print("Formatting %s...\n", volume);
 
@@ -658,6 +673,7 @@
 
     for (;;) {
         finish_recovery(NULL);
+        ui->SetBackground(RecoveryUI::NO_COMMAND);
         ui->SetProgressType(RecoveryUI::EMPTY);
 
         int chosen_item = get_menu_selection(headers, device->GetMenuItems(), 0, 0, device);
@@ -679,6 +695,7 @@
                 break;
 
             case Device::WIPE_CACHE:
+                ui->ShowText(false);
                 ui->Print("\n-- Wiping cache...\n");
                 erase_volume("/cache");
                 ui->Print("Cache wipe complete.\n");
@@ -757,6 +774,24 @@
     printf("%s=%s\n", key, name);
 }
 
+static void
+load_locale_from_cache() {
+    FILE* fp = fopen_path(LOCALE_FILE, "r");
+    char buffer[80];
+    if (fp != NULL) {
+        fgets(buffer, sizeof(buffer), fp);
+        int j = 0;
+        int i;
+        for (i = 0; i < sizeof(buffer) && buffer[i]; ++i) {
+            if (!isspace(buffer[i])) {
+                buffer[j++] = buffer[i];
+            }
+        }
+        buffer[j] = 0;
+        locale = strdup(buffer);
+    }
+}
+
 int
 main(int argc, char **argv) {
     time_t start = time(NULL);
@@ -779,18 +814,13 @@
 
     printf("Starting recovery on %s", ctime(&start));
 
-    Device* device = make_device();
-    ui = device->GetUI();
-
-    ui->Init();
-    ui->SetBackground(RecoveryUI::NONE);
     load_volume_table();
     get_args(&argc, &argv);
 
     int previous_runs = 0;
     const char *send_intent = NULL;
     const char *update_package = NULL;
-    int wipe_data = 0, wipe_cache = 0;
+    int wipe_data = 0, wipe_cache = 0, show_text = 0;
     bool just_exit = false;
 
     int arg;
@@ -801,14 +831,27 @@
         case 'u': update_package = optarg; break;
         case 'w': wipe_data = wipe_cache = 1; break;
         case 'c': wipe_cache = 1; break;
-        case 't': ui->ShowText(true); break;
+        case 't': show_text = 1; break;
         case 'x': just_exit = true; break;
+        case 'l': locale = optarg; break;
         case '?':
             LOGE("Invalid command argument\n");
             continue;
         }
     }
 
+    if (locale == NULL) {
+        load_locale_from_cache();
+    }
+    printf("locale is [%s]\n", locale);
+
+    Device* device = make_device();
+    ui = device->GetUI();
+
+    ui->Init();
+    ui->SetBackground(RecoveryUI::NONE);
+    if (show_text) ui->ShowText(true);
+
 #ifdef HAVE_SELINUX
     struct selinux_opt seopts[] = {
       { SELABEL_OPT_PATH, "/file_contexts" }
@@ -868,10 +911,13 @@
         if (wipe_cache && erase_volume("/cache")) status = INSTALL_ERROR;
         if (status != INSTALL_SUCCESS) ui->Print("Cache wipe failed.\n");
     } else if (!just_exit) {
-        status = INSTALL_ERROR;  // No command specified
+        status = INSTALL_NONE;  // No command specified
+        ui->SetBackground(RecoveryUI::NO_COMMAND);
     }
 
-    if (status != INSTALL_SUCCESS) ui->SetBackground(RecoveryUI::ERROR);
+    if (status == INSTALL_ERROR || status == INSTALL_CORRUPT) {
+        ui->SetBackground(RecoveryUI::ERROR);
+    }
     if (status != INSTALL_SUCCESS || ui->IsTextVisible()) {
         prompt_and_wait(device);
     }
diff --git a/res/images/erasing_text.png b/res/images/erasing_text.png
new file mode 100644
index 0000000..f921197
--- /dev/null
+++ b/res/images/erasing_text.png
Binary files differ
diff --git a/res/images/error_text.png b/res/images/error_text.png
new file mode 100644
index 0000000..5813470
--- /dev/null
+++ b/res/images/error_text.png
Binary files differ
diff --git a/res/images/icon_error.png b/res/images/icon_error.png
index cb3d1ab..7000d4d 100644
--- a/res/images/icon_error.png
+++ b/res/images/icon_error.png
Binary files differ
diff --git a/res/images/icon_installing.png b/res/images/icon_installing.png
index 571eb8b..ad79277 100644
--- a/res/images/icon_installing.png
+++ b/res/images/icon_installing.png
Binary files differ
diff --git a/res/images/icon_installing_overlay01.png b/res/images/icon_installing_overlay01.png
index e762d6c..c9f6125 100644
--- a/res/images/icon_installing_overlay01.png
+++ b/res/images/icon_installing_overlay01.png
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diff --git a/res/images/icon_installing_overlay02.png b/res/images/icon_installing_overlay02.png
index f7a8530..c87e5fa 100644
--- a/res/images/icon_installing_overlay02.png
+++ b/res/images/icon_installing_overlay02.png
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diff --git a/res/images/icon_installing_overlay03.png b/res/images/icon_installing_overlay03.png
index 1a1d738..30e9580 100644
--- a/res/images/icon_installing_overlay03.png
+++ b/res/images/icon_installing_overlay03.png
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diff --git a/res/images/icon_installing_overlay04.png b/res/images/icon_installing_overlay04.png
index a74903d..6f1f9cf 100644
--- a/res/images/icon_installing_overlay04.png
+++ b/res/images/icon_installing_overlay04.png
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diff --git a/res/images/icon_installing_overlay05.png b/res/images/icon_installing_overlay05.png
index d17bdc0..8791abd 100644
--- a/res/images/icon_installing_overlay05.png
+++ b/res/images/icon_installing_overlay05.png
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diff --git a/res/images/icon_installing_overlay06.png b/res/images/icon_installing_overlay06.png
index 1200b75..08a0133 100644
--- a/res/images/icon_installing_overlay06.png
+++ b/res/images/icon_installing_overlay06.png
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diff --git a/res/images/icon_installing_overlay07.png b/res/images/icon_installing_overlay07.png
index 3838a85..15b53d9 100644
--- a/res/images/icon_installing_overlay07.png
+++ b/res/images/icon_installing_overlay07.png
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diff --git a/res/images/icon_installing_overlay08.png b/res/images/icon_installing_overlay08.png
new file mode 100644
index 0000000..bb49878
--- /dev/null
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diff --git a/res/images/icon_installing_overlay09.png b/res/images/icon_installing_overlay09.png
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--- /dev/null
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diff --git a/res/images/icon_installing_overlay10.png b/res/images/icon_installing_overlay10.png
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+++ b/res/images/icon_installing_overlay10.png
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diff --git a/res/images/icon_installing_overlay11.png b/res/images/icon_installing_overlay11.png
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--- /dev/null
+++ b/res/images/icon_installing_overlay11.png
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--- /dev/null
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diff --git a/res/images/indeterminate01.png b/res/images/indeterminate01.png
index 933528d..4db3843 100644
--- a/res/images/indeterminate01.png
+++ b/res/images/indeterminate01.png
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diff --git a/res/images/indeterminate02.png b/res/images/indeterminate02.png
index d760e2b..761b233 100644
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index 0e97399..e2617ab 100644
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index c7d5b4e..132940e 100644
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index d6fb2a0..a17032c 100644
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diff --git a/res/images/indeterminate14.png b/res/images/indeterminate14.png
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diff --git a/res/images/indeterminate15.png b/res/images/indeterminate15.png
new file mode 100644
index 0000000..018fa68
--- /dev/null
+++ b/res/images/indeterminate15.png
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diff --git a/res/images/indeterminate16.png b/res/images/indeterminate16.png
new file mode 100644
index 0000000..e8e05b6
--- /dev/null
+++ b/res/images/indeterminate16.png
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diff --git a/res/images/installing_text.png b/res/images/installing_text.png
new file mode 100644
index 0000000..c48a452
--- /dev/null
+++ b/res/images/installing_text.png
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diff --git a/res/images/no_command_text.png b/res/images/no_command_text.png
new file mode 100644
index 0000000..1d6a5b7
--- /dev/null
+++ b/res/images/no_command_text.png
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diff --git a/screen_ui.cpp b/screen_ui.cpp
index 3c6c3ae..1f2471a 100644
--- a/screen_ui.cpp
+++ b/screen_ui.cpp
@@ -75,10 +75,10 @@
     // that overrides Init() to set these values appropriately and
     // then call the superclass Init().
     animation_fps(20),
-    indeterminate_frames(6),
-    installing_frames(7),
-    install_overlay_offset_x(13),
-    install_overlay_offset_y(190) {
+    indeterminate_frames(16),
+    installing_frames(48),
+    install_overlay_offset_x(65),
+    install_overlay_offset_y(106) {
     pthread_mutex_init(&updateMutex, NULL);
     self = this;
 }
@@ -94,7 +94,7 @@
     int iconWidth = gr_get_width(surface);
     int iconHeight = gr_get_height(surface);
     gr_blit(surface, 0, 0, iconWidth, iconHeight,
-            install_overlay_offset_x, install_overlay_offset_y);
+            overlay_offset_x, overlay_offset_y);
 }
 
 // Clear the screen and draw the currently selected background icon (if any).
@@ -107,14 +107,26 @@
 
     if (icon) {
         gr_surface surface = backgroundIcon[icon];
+        gr_surface text_surface = backgroundText[icon];
+
         int iconWidth = gr_get_width(surface);
         int iconHeight = gr_get_height(surface);
+        int textWidth = gr_get_width(text_surface);
+        int textHeight = gr_get_height(text_surface);
+
         int iconX = (gr_fb_width() - iconWidth) / 2;
-        int iconY = (gr_fb_height() - iconHeight) / 2;
+        int iconY = (gr_fb_height() - (iconHeight+textHeight+40)) / 2;
+
+        int textX = (gr_fb_width() - textWidth) / 2;
+        int textY = ((gr_fb_height() - (iconHeight+textHeight+40)) / 2) + iconHeight + 40;
+
         gr_blit(surface, 0, 0, iconWidth, iconHeight, iconX, iconY);
-        if (icon == INSTALLING) {
+        if (icon == INSTALLING_UPDATE || icon == ERASING) {
             draw_install_overlay_locked(installingFrame);
         }
+
+        gr_color(255, 255, 255, 255);
+        gr_texticon(textX, textY, text_surface);
     }
 }
 
@@ -124,12 +136,12 @@
 {
     if (currentIcon == ERROR) return;
 
-    if (currentIcon == INSTALLING) {
+    if (currentIcon == INSTALLING_UPDATE || currentIcon == ERASING) {
         draw_install_overlay_locked(installingFrame);
     }
 
     if (progressBarType != EMPTY) {
-        int iconHeight = gr_get_height(backgroundIcon[INSTALLING]);
+        int iconHeight = gr_get_height(backgroundIcon[INSTALLING_UPDATE]);
         int width = gr_get_width(progressBarEmpty);
         int height = gr_get_height(progressBarEmpty);
 
@@ -242,7 +254,8 @@
 
         // update the installation animation, if active
         // skip this if we have a text overlay (too expensive to update)
-        if (currentIcon == INSTALLING && installing_frames > 0 && !show_text) {
+        if ((currentIcon == INSTALLING_UPDATE || currentIcon == ERASING) &&
+            installing_frames > 0 && !show_text) {
             installingFrame = (installingFrame + 1) % installing_frames;
             redraw = 1;
         }
@@ -283,6 +296,13 @@
     }
 }
 
+void ScreenRecoveryUI::LoadLocalizedBitmap(const char* filename, gr_surface* surface) {
+    int result = res_create_localized_surface(filename, surface);
+    if (result < 0) {
+        LOGE("missing bitmap %s\n(Code %d)\n", filename, result);
+    }
+}
+
 void ScreenRecoveryUI::Init()
 {
     gr_init();
@@ -295,11 +315,19 @@
     text_cols = gr_fb_width() / CHAR_WIDTH;
     if (text_cols > kMaxCols - 1) text_cols = kMaxCols - 1;
 
-    LoadBitmap("icon_installing", &backgroundIcon[INSTALLING]);
+    LoadBitmap("icon_installing", &backgroundIcon[INSTALLING_UPDATE]);
+    backgroundIcon[ERASING] = backgroundIcon[INSTALLING_UPDATE];
     LoadBitmap("icon_error", &backgroundIcon[ERROR]);
+    backgroundIcon[NO_COMMAND] = backgroundIcon[ERROR];
+
     LoadBitmap("progress_empty", &progressBarEmpty);
     LoadBitmap("progress_fill", &progressBarFill);
 
+    LoadLocalizedBitmap("installing_text", &backgroundText[INSTALLING_UPDATE]);
+    LoadLocalizedBitmap("erasing_text", &backgroundText[ERASING]);
+    LoadLocalizedBitmap("no_command_text", &backgroundText[NO_COMMAND]);
+    LoadLocalizedBitmap("error_text", &backgroundText[ERROR]);
+
     int i;
 
     progressBarIndeterminate = (gr_surface*)malloc(indeterminate_frames *
@@ -321,14 +349,6 @@
             sprintf(filename, "icon_installing_overlay%02d", i+1);
             LoadBitmap(filename, installationOverlay+i);
         }
-
-        // Adjust the offset to account for the positioning of the
-        // base image on the screen.
-        if (backgroundIcon[INSTALLING] != NULL) {
-            gr_surface bg = backgroundIcon[INSTALLING];
-            install_overlay_offset_x += (gr_fb_width() - gr_get_width(bg)) / 2;
-            install_overlay_offset_y += (gr_fb_height() - gr_get_height(bg)) / 2;
-        }
     } else {
         installationOverlay = NULL;
     }
@@ -343,6 +363,17 @@
     pthread_mutex_lock(&updateMutex);
     currentIcon = icon;
     update_screen_locked();
+
+    // Adjust the offset to account for the positioning of the
+    // base image on the screen.
+    if (backgroundIcon[icon] != NULL) {
+        gr_surface bg = backgroundIcon[icon];
+        gr_surface text = backgroundText[icon];
+        overlay_offset_x = install_overlay_offset_x + (gr_fb_width() - gr_get_width(bg)) / 2;
+        overlay_offset_y = install_overlay_offset_y +
+            (gr_fb_height() - (gr_get_height(bg) + gr_get_height(text) + 40)) / 2;
+    }
+
     pthread_mutex_unlock(&updateMutex);
 }
 
diff --git a/screen_ui.h b/screen_ui.h
index 34929ee..16ee741 100644
--- a/screen_ui.h
+++ b/screen_ui.h
@@ -57,7 +57,8 @@
     int installingFrame;
 
     pthread_mutex_t updateMutex;
-    gr_surface backgroundIcon[3];
+    gr_surface backgroundIcon[5];
+    gr_surface backgroundText[5];
     gr_surface *installationOverlay;
     gr_surface *progressBarIndeterminate;
     gr_surface progressBarEmpty;
@@ -92,6 +93,7 @@
     int indeterminate_frames;
     int installing_frames;
     int install_overlay_offset_x, install_overlay_offset_y;
+    int overlay_offset_x, overlay_offset_y;
 
     void draw_install_overlay_locked(int frame);
     void draw_background_locked(Icon icon);
@@ -104,7 +106,7 @@
     void progress_loop();
 
     void LoadBitmap(const char* filename, gr_surface* surface);
-
+    void LoadLocalizedBitmap(const char* filename, gr_surface* surface);
 };
 
 #endif  // RECOVERY_UI_H
diff --git a/testdata/otasigned_f4.zip b/testdata/otasigned_f4.zip
new file mode 100644
index 0000000..dd1e4dd
--- /dev/null
+++ b/testdata/otasigned_f4.zip
Binary files differ
diff --git a/testdata/test_f4.pk8 b/testdata/test_f4.pk8
new file mode 100644
index 0000000..3052613
--- /dev/null
+++ b/testdata/test_f4.pk8
Binary files differ
diff --git a/testdata/test_f4.x509.pem b/testdata/test_f4.x509.pem
new file mode 100644
index 0000000..814abcf
--- /dev/null
+++ b/testdata/test_f4.x509.pem
@@ -0,0 +1,25 @@
+-----BEGIN CERTIFICATE-----
+MIIENjCCAx6gAwIBAgIJAKhkCO1dDYMaMA0GCSqGSIb3DQEBBQUAMG8xCzAJBgNV
+BAYTAlVTMRMwEQYDVQQIEwpDYWxpZm9ybmlhMRYwFAYDVQQHEw1Nb3VudGFpbiBW
+aWV3MQ8wDQYDVQQKEwZHb29nbGUxEDAOBgNVBAsTB0FuZHJvaWQxEDAOBgNVBAMT
+B1Rlc3QxMjMwHhcNMTIwNzI1MTg1NzAzWhcNMzkxMjExMTg1NzAzWjBvMQswCQYD
+VQQGEwJVUzETMBEGA1UECBMKQ2FsaWZvcm5pYTEWMBQGA1UEBxMNTW91bnRhaW4g
+VmlldzEPMA0GA1UEChMGR29vZ2xlMRAwDgYDVQQLEwdBbmRyb2lkMRAwDgYDVQQD
+EwdUZXN0MTIzMIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAu8WwMN9x
+4Mz7YgkG2qy9g8/kl5ZoYrUM0ApHhaITAcL7RXLZaNipCf0w/YjYTQgj+75MK30x
+TsnPeWNOEwA62gkHrZyyWfxBRO6kBYuIuI4roGDBJOmKQ1OEaDeIRKu7q5V8v3Cs
+0wQDAQWTbhpxBZr9UYFgJUg8XWBfPrGJLVwsoiy4xrMhoTlNZKHfwOMMqVtSHkZX
+qydYrcIzyjh+TO0e/xSNQ8MMRRbtqWgCHN6Rzhog3IHZu0RaPoukariopjXM/s0V
+gTm3rHDHCOpna2pNblyiFlvbkoCs769mtNmx/yrDShO30jg/xaG8RypKDvTChzOT
+oWW/XQ5VEXjbHwIDAQABo4HUMIHRMB0GA1UdDgQWBBRlT2dEZJY1tmUM8mZ0xnhS
+GdD9TTCBoQYDVR0jBIGZMIGWgBRlT2dEZJY1tmUM8mZ0xnhSGdD9TaFzpHEwbzEL
+MAkGA1UEBhMCVVMxEzARBgNVBAgTCkNhbGlmb3JuaWExFjAUBgNVBAcTDU1vdW50
+YWluIFZpZXcxDzANBgNVBAoTBkdvb2dsZTEQMA4GA1UECxMHQW5kcm9pZDEQMA4G
+A1UEAxMHVGVzdDEyM4IJAKhkCO1dDYMaMAwGA1UdEwQFMAMBAf8wDQYJKoZIhvcN
+AQEFBQADggEBAHqnXHtE+h3hvGmHh24GT51vGAYLc68WUUtCVlMIU85zQ757wlxZ
+BmRypZ1i9hSqnXj5n+mETV5rFX3g2gvdAPVHkRycuDa2aUdZSE8cW4Z6qYFx6SaD
+e+3SyXokpUquW64RuHJrf/yd/FnGjneBe3Qpm2reuzGWNH90qZGdbsfNaCm5kx2L
+X+ZNHM3CcGMLaphY5++sM0JxSEcju5EK33ZYgLf4YdlbyMp8LDFVNd7ff0SFi9fF
+0ZlAsJWoS3QmVCj2744BFdsCu7UHpnYpG6X3MT4SHAawdOaT5zSuaCl2xx6H0O7t
+w/Fvbl/KVD1ZmLHgBKjDMNSh0OB9mSsDWpw=
+-----END CERTIFICATE-----
diff --git a/ui.h b/ui.h
index 0d3b7bb..ccbb466 100644
--- a/ui.h
+++ b/ui.h
@@ -31,7 +31,7 @@
     virtual void Init();
 
     // Set the overall recovery state ("background image").
-    enum Icon { NONE, INSTALLING, ERROR };
+    enum Icon { NONE, INSTALLING_UPDATE, ERASING, NO_COMMAND, ERROR };
     virtual void SetBackground(Icon icon) = 0;
 
     // --- progress indicator ---
diff --git a/updater/install.c b/updater/install.c
index f981017..41f053d 100644
--- a/updater/install.c
+++ b/updater/install.c
@@ -456,6 +456,26 @@
     }
 }
 
+// Create all parent directories of name, if necessary.
+static int make_parents(char* name) {
+    char* p;
+    for (p = name + (strlen(name)-1); p > name; --p) {
+        if (*p != '/') continue;
+        *p = '\0';
+        if (make_parents(name) < 0) return -1;
+        int result = mkdir(name, 0700);
+        if (result == 0) fprintf(stderr, "symlink(): created [%s]\n", name);
+        *p = '/';
+        if (result == 0 || errno == EEXIST) {
+            // successfully created or already existed; we're done
+            return 0;
+        } else {
+            fprintf(stderr, "failed to mkdir %s: %s\n", name, strerror(errno));
+            return -1;
+        }
+    }
+    return 0;
+}
 
 // symlink target src1 src2 ...
 //    unlinks any previously existing src1, src2, etc before creating symlinks.
@@ -483,6 +503,11 @@
                 ++bad;
             }
         }
+        if (make_parents(srcs[i])) {
+            fprintf(stderr, "%s: failed to symlink %s to %s: making parents failed\n",
+                    name, srcs[i], target);
+            ++bad;
+        }
         if (symlink(target, srcs[i]) < 0) {
             fprintf(stderr, "%s: failed to symlink %s to %s: %s\n",
                     name, srcs[i], target, strerror(errno));
@@ -504,7 +529,8 @@
 
     int min_args = 4 + (recursive ? 1 : 0);
     if (argc < min_args) {
-        return ErrorAbort(state, "%s() expects %d+ args, got %d", name, argc);
+        return ErrorAbort(state, "%s() expects %d+ args, got %d",
+                          name, min_args, argc);
     }
 
     char** args = ReadVarArgs(state, argc, argv);
@@ -626,7 +652,7 @@
 
     buffer = malloc(st.st_size+1);
     if (buffer == NULL) {
-        ErrorAbort(state, "%s: failed to alloc %d bytes", name, st.st_size+1);
+        ErrorAbort(state, "%s: failed to alloc %lld bytes", name, st.st_size+1);
         goto done;
     }
 
@@ -638,7 +664,7 @@
     }
 
     if (fread(buffer, 1, st.st_size, f) != st.st_size) {
-        ErrorAbort(state, "%s: failed to read %d bytes from %s",
+        ErrorAbort(state, "%s: failed to read %lld bytes from %s",
                    name, st.st_size+1, filename);
         fclose(f);
         goto done;
@@ -875,7 +901,7 @@
 
     int result = applypatch(source_filename, target_filename,
                             target_sha1, target_size,
-                            patchcount, patch_sha_str, patches);
+                            patchcount, patch_sha_str, patches, NULL);
 
     for (i = 0; i < patchcount; ++i) {
         FreeValue(patches[i]);
diff --git a/verifier_test.cpp b/verifier_test.cpp
index fe5519d..01d0926 100644
--- a/verifier_test.cpp
+++ b/verifier_test.cpp
@@ -56,7 +56,45 @@
         9135381, 1625809335, -1490225159, -1342673351,
         1117190829, -57654514, 1825108855, -1281819325,
         1111251351, -1726129724, 1684324211, -1773988491,
-        367251975, 810756730, -1941182952, 1175080310 }
+        367251975, 810756730, -1941182952, 1175080310 },
+      3
+    };
+
+RSAPublicKey test_f4_key =
+    { 64, 0xc9bd1f21,
+      { 293133087u, 3210546773u, 865313125u, 250921607u,
+        3158780490u, 943703457u, 1242806226u, 2986289859u,
+        2942743769u, 2457906415u, 2719374299u, 1783459420u,
+        149579627u, 3081531591u, 3440738617u, 2788543742u,
+        2758457512u, 1146764939u, 3699497403u, 2446203424u,
+        1744968926u, 1159130537u, 2370028300u, 3978231572u,
+        3392699980u, 1487782451u, 1180150567u, 2841334302u,
+        3753960204u, 961373345u, 3333628321u, 748825784u,
+        2978557276u, 1566596926u, 1613056060u, 2600292737u,
+        1847226629u, 50398611u, 1890374404u, 2878700735u,
+        2286201787u, 1401186359u, 619285059u, 731930817u,
+        2340993166u, 1156490245u, 2992241729u, 151498140u,
+        318782170u, 3480838990u, 2100383433u, 4223552555u,
+        3628927011u, 4247846280u, 1759029513u, 4215632601u,
+        2719154626u, 3490334597u, 1751299340u, 3487864726u,
+        3668753795u, 4217506054u, 3748782284u, 3150295088u },
+      { 1772626313u, 445326068u, 3477676155u, 1758201194u,
+        2986784722u, 491035581u, 3922936562u, 702212696u,
+        2979856666u, 3324974564u, 2488428922u, 3056318590u,
+        1626954946u, 664714029u, 398585816u, 3964097931u,
+        3356701905u, 2298377729u, 2040082097u, 3025491477u,
+        539143308u, 3348777868u, 2995302452u, 3602465520u,
+        212480763u, 2691021393u, 1307177300u, 704008044u,
+        2031136606u, 1054106474u, 3838318865u, 2441343869u,
+        1477566916u, 700949900u, 2534790355u, 3353533667u,
+        336163563u, 4106790558u, 2701448228u, 1571536379u,
+        1103842411u, 3623110423u, 1635278839u, 1577828979u,
+        910322800u, 715583630u, 138128831u, 1017877531u,
+        2289162787u, 447994798u, 1897243165u, 4121561445u,
+        4150719842u, 2131821093u, 2262395396u, 3305771534u,
+        980753571u, 3256525190u, 3128121808u, 1072869975u,
+        3507939515u, 4229109952u, 118381341u, 2209831334u },
+      65537
     };
 
 RecoveryUI* ui = NULL;
@@ -91,14 +129,21 @@
 };
 
 int main(int argc, char **argv) {
-    if (argc != 2) {
-        fprintf(stderr, "Usage: %s <package>\n", argv[0]);
+    if (argc != 2 && argc != 3) {
+        fprintf(stderr, "Usage: %s [-f4] <package>\n", argv[0]);
         return 2;
     }
 
+    RSAPublicKey* key = &test_key;
+    ++argv;
+    if (strcmp(argv[0], "-f4") == 0) {
+        ++argv;
+        key = &test_f4_key;
+    }
+
     ui = new FakeUI();
 
-    int result = verify_file(argv[1], &test_key, 1);
+    int result = verify_file(*argv, key, 1);
     if (result == VERIFY_SUCCESS) {
         printf("SUCCESS\n");
         return 0;
diff --git a/verifier_test.sh b/verifier_test.sh
index a1de5c5..378b0e5 100755
--- a/verifier_test.sh
+++ b/verifier_test.sh
@@ -73,9 +73,24 @@
   run_command $WORK_DIR/verifier_test $WORK_DIR/package.zip && fail
 }
 
+expect_succeed_f4() {
+  testname "$1 (should succeed)"
+  $ADB push $DATA_DIR/$1 $WORK_DIR/package.zip
+  run_command $WORK_DIR/verifier_test -f4 $WORK_DIR/package.zip || fail
+}
+
+expect_fail_f4() {
+  testname "$1 (should fail)"
+  $ADB push $DATA_DIR/$1 $WORK_DIR/package.zip
+  run_command $WORK_DIR/verifier_test -f4 $WORK_DIR/package.zip && fail
+}
+
 expect_fail unsigned.zip
 expect_fail jarsigned.zip
 expect_succeed otasigned.zip
+expect_fail_f4 otasigned.zip
+expect_succeed_f4 otasigned_f4.zip
+expect_fail otasigned_f4.zip
 expect_fail random.zip
 expect_fail fake-eocd.zip
 expect_fail alter-metadata.zip