diff -ru4NwbB libpng-1.4.5/contrib/pngminim/encoder/pngusr.h libpng-1.4.6beta02/contrib/pngminim/encoder/pngusr.h
--- libpng-1.4.5/contrib/pngminim/encoder/pngusr.h	2010-12-09 07:48:12.146321599 -0600
+++ libpng-1.4.6beta02/contrib/pngminim/encoder/pngusr.h	2011-01-14 20:22:58.095010418 -0600
@@ -69,7 +69,7 @@
 #define PNG_NO_ERROR_NUMBERS
 #define PNG_NO_EASY_ACCESS
 #define PNG_NO_USER_LIMITS
 #define PNG_NO_SET_USER_LIMITS
-#define PNG_NO_TIME_RFC1143
+#define PNG_NO_TIME_RFC1123
 
 #endif /* MINWRPNGCONF_H */
diff -ru4NwbB libpng-1.4.5/contrib/pngminim/preader/pngusr.h libpng-1.4.6beta02/contrib/pngminim/preader/pngusr.h
--- libpng-1.4.5/contrib/pngminim/preader/pngusr.h	2010-12-09 07:48:12.181767101 -0600
+++ libpng-1.4.6beta02/contrib/pngminim/preader/pngusr.h	2011-01-14 20:22:58.129854193 -0600
@@ -62,7 +62,7 @@
 #define PNG_NO_ERROR_NUMBERS
 #define PNG_NO_EASY_ACCESS
 #define PNG_NO_USER_LIMITS
 #define PNG_NO_SET_USER_LIMITS
-#define PNG_NO_TIME_RFC1143
+#define PNG_NO_TIME_RFC1123
 
 #endif /* MINPRDPNGCONF_H */
diff -ru4NwbB libpng-1.4.5/png.h libpng-1.4.6beta02/png.h
--- libpng-1.4.5/png.h	2010-12-09 07:48:11.265430061 -0600
+++ libpng-1.4.6beta02/png.h	2011-01-14 20:22:57.175178925 -0600
@@ -152,8 +152,10 @@
  *    1.4.5rc01               14    10405  14.so.14.5[.0]
  *    1.4.5beta05-07          14    10405  14.so.14.5[.0]
  *    1.4.5rc02-03            14    10405  14.so.14.5[.0]
  *    1.4.5                   14    10405  14.so.14.5[.0]
+ *    1.4.6beta01-02          14    10406  14.so.14.6[.0]
+ *    1.4.6rc01               14    10406  14.so.14.6[.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-1.4.5/pngread.c libpng-1.4.6beta02/pngread.c
--- libpng-1.4.5/pngread.c	2010-12-09 07:48:11.337481929 -0600
+++ libpng-1.4.6beta02/pngread.c	2011-01-14 20:22:57.248855988 -0600
@@ -1,8 +1,8 @@
 
 /* pngread.c - read a PNG file
  *
- * Last changed in libpng 1.4.5 [January 15, 2011]
+ * Last changed in libpng 1.4.5 [December 9, 2010]
  * Copyright (c) 1998-2010 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.)
  *
diff -ru4NwbB libpng-1.4.5/pngrio.c libpng-1.4.6beta02/pngrio.c
--- libpng-1.4.5/pngrio.c	2010-12-09 07:48:11.342533773 -0600
+++ libpng-1.4.6beta02/pngrio.c	2011-01-14 20:22:57.254126391 -0600
@@ -1,8 +1,8 @@
 
 /* pngrio.c - functions for data input
  *
- * Last changed in libpng 1.4.5 [January 15, 2011]
+ * Last changed in libpng 1.4.5 [December 9, 2010]
  * Copyright (c) 1998-2010 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.)
  *
diff -ru4NwbB libpng-1.4.5/pngrtran.c libpng-1.4.6beta02/pngrtran.c
--- libpng-1.4.5/pngrtran.c	2010-12-09 07:48:11.359864654 -0600
+++ libpng-1.4.6beta02/pngrtran.c	2011-01-14 20:22:57.271291516 -0600
@@ -1,9 +1,9 @@
 
 /* pngrtran.c - transforms the data in a row for PNG readers
  *
- * Last changed in libpng 1.4.5 [January 15, 2011]
- * Copyright (c) 1998-2010 Glenn Randers-Pehrson
+ * Last changed in libpng 1.4.6 [%RDATE%]
+ * Copyright (c) 1998-2011 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.)
  *
  * This code is released under the libpng license.
@@ -1007,9 +1007,9 @@
              * to a simple alpha channel strip.
              */
             png_ptr->transformations &= ~PNG_BACKGROUND;
             png_ptr->transformations &= ~PNG_GAMMA;
-            png_ptr->transformations |= PNG_STRIP_ALPHA;
+            png_ptr->flags |= PNG_FLAG_STRIP_ALPHA;
          }
          /* if (png_ptr->background_gamma_type!=PNG_BACKGROUND_GAMMA_UNKNOWN) */
          else
          /* color_type != PNG_COLOR_TYPE_PALETTE */
@@ -1130,9 +1130,9 @@
       }
 
       /* Handled alpha, still need to strip the channel. */
       png_ptr->transformations &= ~PNG_BACKGROUND;
-      png_ptr->transformations |= PNG_STRIP_ALPHA;
+      png_ptr->flags |= PNG_FLAG_STRIP_ALPHA;
    }
 #endif /* PNG_READ_BACKGROUND_SUPPORTED */
 
 #ifdef PNG_READ_SHIFT_SUPPORTED
diff -ru4NwbB libpng-1.4.5/pngrutil.c libpng-1.4.6beta02/pngrutil.c
--- libpng-1.4.5/pngrutil.c	2010-12-09 07:48:11.374981056 -0600
+++ libpng-1.4.6beta02/pngrutil.c	2011-01-14 20:22:57.286413138 -0600
@@ -1,8 +1,8 @@
 
 /* pngrutil.c - utilities to read a PNG file
  *
- * Last changed in libpng 1.4.5 [January 15, 2011]
+ * Last changed in libpng 1.4.5 [December 9, 2010]
  * Copyright (c) 1998-2010 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.)
  *
diff -ru4NwbB libpng-1.4.5/pngset.c libpng-1.4.6beta02/pngset.c
--- libpng-1.4.5/pngset.c	2010-12-09 07:48:11.383950690 -0600
+++ libpng-1.4.6beta02/pngset.c	2011-01-14 20:22:57.295108119 -0600
@@ -1,8 +1,8 @@
 
 /* pngset.c - storage of image information into info struct
  *
- * Last changed in libpng 1.4.5 [January 15, 2011]
+ * Last changed in libpng 1.4.5 [December 9, 2010]
  * Copyright (c) 1998-2010 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.)
  *
diff -ru4NwbB libpng-1.4.5/pngtest.c libpng-1.4.6beta02/pngtest.c
--- libpng-1.4.5/pngtest.c	2010-12-09 07:48:11.393765714 -0600
+++ libpng-1.4.6beta02/pngtest.c	2011-01-14 20:22:57.305025777 -0600
@@ -1,8 +1,8 @@
 
 /* pngtest.c - a simple test program to test libpng
  *
- * Last changed in libpng 1.4.5 [January 15, 2011]
+ * Last changed in libpng 1.4.5 [December 9, 2010]
  * Copyright (c) 1998-2010 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.)
  *