diff -ru4NwbB libpng-1.2.32/example.c libpng-1.2.33/example.c
--- libpng-1.2.32/example.c	2008-09-18 04:48:01.734430400 -0500
+++ libpng-1.2.33/example.c	2008-10-31 08:42:01.872421072 -0500
@@ -1,9 +1,9 @@
 
 #if 0 /* in case someone actually tries to compile this */
 
 /* example.c - an example of using libpng
- * Last changed in libpng 1.2.32 [October 31, 2008]
+ * Last changed in libpng 1.2.33 [October 31, 2008]
  * This file has been placed in the public domain by the authors.
  * Maintained 1998-2008 Glenn Randers-Pehrson
  * Maintained 1996, 1997 Andreas Dilger)
  * Written 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
@@ -203,9 +203,9 @@
       png_set_palette_to_rgb(png_ptr);
 
    /* Expand grayscale images to the full 8 bits from 1, 2, or 4 bits/pixel */
    if (color_type == PNG_COLOR_TYPE_GRAY && bit_depth < 8)
-      png_set_gray_1_2_4_to_8(png_ptr);
+      png_set_expand_gray_1_2_4_to_8(png_ptr);
 
    /* Expand paletted or RGB images with transparency to full alpha channels
     * so the data will be available as RGBA quartets.
     */
diff -ru4NwbB libpng-1.2.32/png.h libpng-1.2.33/png.h
--- libpng-1.2.32/png.h	2008-09-18 04:48:01.711532270 -0500
+++ libpng-1.2.33/png.h	2008-10-31 08:42:01.856878980 -0500
@@ -206,8 +206,13 @@
  *    1.0.40rc01              10    10040  10.so.0.40[.0]
  *    1.2.32rc01              13    10232  12.so.0.32[.0]
  *    1.0.40                  10    10040  10.so.0.40[.0]
  *    1.2.32                  13    10232  12.so.0.32[.0]
+ *    1.2.33beta01-02         13    10233  12.so.0.33[.0]
+ *    1.2.33rc01-02           13    10233  12.so.0.33[.0]
+ *    1.0.41rc01              10    10041  10.so.0.41[.0]
+ *    1.2.33                  13    10233  12.so.0.33[.0]
+ *    1.0.41                  10    10041  10.so.0.41[.0]
  *
  *    Henceforth the source version will match the shared-library major
  *    and minor numbers; the shared-library major version number will be
  *    used for changes in backward compatibility, as it is intended.  The
diff -ru4NwbB libpng-1.2.32/pngrutil.c libpng-1.2.33/pngrutil.c
--- libpng-1.2.32/pngrutil.c	2008-09-18 04:48:01.842178854 -0500
+++ libpng-1.2.33/pngrutil.c	2008-10-31 08:42:01.948395150 -0500
@@ -1,8 +1,8 @@
 
 /* pngrutil.c - utilities to read a PNG file
  *
- * Last changed in libpng 1.2.31 [August 19, 2008]
+ * Last changed in libpng 1.2.33 [October 31, 2008]
  * For conditions of distribution and use, see copyright notice in png.h
  * Copyright (c) 1998-2008 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
  * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
@@ -1939,23 +1939,26 @@
       length = (png_uint_32)65535L;
    }
 #endif
 
-   key = (png_charp)png_malloc_warn(png_ptr, length + 1);
-   if (key == NULL)
+   png_free(png_ptr, png_ptr->chunkdata);
+   png_ptr->chunkdata = (png_charp)png_malloc_warn(png_ptr, length + 1);
+   if (png_ptr->chunkdata == NULL)
    {
      png_warning(png_ptr, "No memory to process text chunk.");
      return;
    }
    slength = (png_size_t)length;
-   png_crc_read(png_ptr, (png_bytep)key, slength);
+   png_crc_read(png_ptr, (png_bytep)png_ptr->chunkdata, slength);
 
    if (png_crc_finish(png_ptr, skip))
    {
-      png_free(png_ptr, key);
+      png_free(png_ptr, png_ptr->chunkdata);
+      png_ptr->chunkdata = NULL;
       return;
    }
 
+   key = png_ptr->chunkdata;
    key[slength] = 0x00;
 
    for (text = key; *text; text++)
       /* empty loop to find end of key */ ;
@@ -1967,9 +1970,10 @@
       (png_uint_32)png_sizeof(png_text));
    if (text_ptr == NULL)
    {
      png_warning(png_ptr, "Not enough memory to process text chunk.");
-     png_free(png_ptr, key);
+     png_free(png_ptr, png_ptr->chunkdata);
+     png_ptr->chunkdata = NULL;
      return;
    }
    text_ptr->compression = PNG_TEXT_COMPRESSION_NONE;
    text_ptr->key = key;
@@ -1982,9 +1986,10 @@
    text_ptr->text_length = png_strlen(text);
 
    ret = png_set_text_2(png_ptr, info_ptr, text_ptr, 1);
 
-   png_free(png_ptr, key);
+   png_free(png_ptr, png_ptr->chunkdata);
+   png_ptr->chunkdata = NULL;
    png_free(png_ptr, text_ptr);
    if (ret)
      png_warning(png_ptr, "Insufficient memory to process text chunk.");
 }
diff -ru4NwbB libpng-1.2.32/scripts/makefile.darwin libpng-1.2.33/scripts/makefile.darwin
--- libpng-1.2.32/scripts/makefile.darwin	2008-09-18 04:48:05.484287099 -0500
+++ libpng-1.2.33/scripts/makefile.darwin	2008-10-31 08:42:03.356923116 -0500
@@ -103,16 +103,16 @@
 
 $(LIBSOVER): $(OBJSDLL)
 	$(CC) -dynamiclib \
 	 -install_name $(LIBPATH)/$(LIBSOMAJ) \
-	 -current_version $(SONUM) -compatibility_version $(SONUM) \
+	 -current_version %SONUM% -compatibility_version %SONUM% \
 	 -o $(LIBSOVER) \
 	 $(OBJSDLL) -L$(ZLIBLIB) -lz
 
 $(OLDSOVER): $(OBJSDLL)
 	$(CC) -dynamiclib \
 	 -install_name $(LIBPATH)/$(OLDSOMAJ) \
-	 -current_version %OLDSONUM% -compatibility_version %OLDSONUM% \
+	 -current_version %OLDNUM% -compatibility_version %OLDNUM% \
 	 -o $(OLDSOVER) \
 	 $(OBJSDLL) -L$(ZLIBLIB) -lz
 
 pngtest: pngtest.o $(LIBSO)