diff --git a/ANNOUNCE b/ANNOUNCE
index 5028687..a999161 100644
--- a/ANNOUNCE
+++ b/ANNOUNCE
@@ -1,5 +1,5 @@
 
-Libpng 1.5.0beta01 - February 8, 2010
+Libpng 1.5.0beta02 - February 8, 2010
 
 This is not intended to be a public release.  It will be replaced
 within a few weeks by a public version or by another test version.
@@ -9,25 +9,29 @@
 Source files with LF line endings (for Unix/Linux) and with a
 "configure" script
 
-   1.5.0beta01.tar.xz (LZMA-compressed, recommended)
-   1.5.0beta01.tar.gz
-   1.5.0beta01.tar.bz2
+   1.5.0beta02.tar.xz (LZMA-compressed, recommended)
+   1.5.0beta02.tar.gz
+   1.5.0beta02.tar.bz2
 
 Source files with CRLF line endings (for Windows), without the
 "configure" script
 
-   lp150b01.zip
-   lp150b01.7z
+   lp150b02.zip
+   lp150b02.7z
 
 Other information:
 
-   1.5.0beta01-README.txt
-   1.5.0beta01-LICENSE.txt
+   1.5.0beta02-README.txt
+   1.5.0beta02-LICENSE.txt
 
 Changes since the last public release (1.4.1):
 
-version 1.5.0beta01 [February 8, 2010]
-  Moved declaration of png_struct into private pngstruct.h and png_info into pnginfo.h
+version 1.5.0beta01 [February 7, 2010]
+  Moved declaration of png_struct into private pngstruct.h and png_info
+    into pnginfo.h
+
+version 1.5.0beta02 [February 8, 2010]
+  Fixed incorrect test in new png_push_save_buffer() code.
 
 Send comments/corrections/commendations to png-mng-implement at lists.sf.net
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diff --git a/CHANGES b/CHANGES
index e27196a..bcbf0bd 100644
--- a/CHANGES
+++ b/CHANGES
@@ -2502,8 +2502,12 @@
 version 1.4.1beta08 [February 6, 2010]
   Minor cleanup and updating of dates and copyright year.
 
-version 1.5.0beta01 [February 8, 2010]
-  Moved declaration of png_struct into private pngstruct.h and png_info into pnginfo.h
+version 1.5.0beta01 [February 7, 2010]
+  Moved declaration of png_struct into private pngstruct.h and png_info
+    into pnginfo.h
+
+version 1.5.0beta02 [February 8, 2010]
+  Fixed incorrect test in new png_push_save_buffer() code.
 
 Send comments/corrections/commendations to png-mng-implement at lists.sf.net
 (subscription required; visit
diff --git a/pngpread.c b/pngpread.c
index 6d6c921..0ef012c 100644
--- a/pngpread.c
+++ b/pngpread.c
@@ -693,8 +693,10 @@
       png_size_t new_max;
       png_bytep old_buffer;
 
-      if (png_ptr->save_buffer_size == PNG_SIZE_MAX)
-        png_error(png_ptr, "Overflow of save_buffer");
+      if (png_ptr->save_buffer_max == PNG_SIZE_MAX ||
+          (png_ptr->save_buffer_size > PNG_SIZE_MAX -
+          png_ptr->current_buffer_size))
+         png_error(png_ptr, "Overflow of save_buffer");
 
       if (png_ptr->save_buffer_size > PNG_SIZE_MAX -
           (png_ptr->current_buffer_size +