diff --git a/ANNOUNCE b/ANNOUNCE
index ee1ee687..e0c0bcfa 100644
--- a/ANNOUNCE
+++ b/ANNOUNCE
@@ -1,5 +1,5 @@
 
-Libpng 1.2.53beta02 - February 5, 2015
+Libpng 1.2.53beta02 - February 6, 2015
 
 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.
@@ -45,7 +45,7 @@ Changes since the last public release (1.2.52):
 
 version 1.2.53beta01 [omitted]
 
-version 1.2.53beta02 [%RDATE%]
+version 1.2.53beta02 [February 6, 2015]
   Issue a png_error() instead of a png_warning() when width is
     potentially too large for the architecture, in case the calling
     application has overridden the default 1,000,000-column limit
diff --git a/CHANGES b/CHANGES
index cb22be41..0ce4fc42 100644
--- a/CHANGES
+++ b/CHANGES
@@ -2830,7 +2830,7 @@ version 1.0.62 and 1.2.52 [November 20, 2014]
 
 version 1.2.53beta01 [omitted]
 
-version 1.2.53beta02 [%RDATE%]
+version 1.2.53beta02 [February 6, 2015]
   Issue a png_error() instead of a png_warning() when width is
     potentially too large for the architecture, in case the calling
     application has overridden the default 1,000,000-column limit
diff --git a/png.c b/png.c
index 086b6a32..26cc2c79 100644
--- a/png.c
+++ b/png.c
@@ -1,8 +1,8 @@
 
 /* png.c - location for general purpose libpng functions
  *
- * Last changed in libpng 1.2.51 [February 6, 2014]
- * Copyright (c) 1998-2014 Glenn Randers-Pehrson
+ * Last changed in libpng 1.2.53 [February 6, 2015]
+ * Copyright (c) 1998-2015 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.)
  *
@@ -158,12 +158,16 @@ voidpf /* PRIVATE */
 png_zalloc(voidpf png_ptr, uInt items, uInt size)
 {
    png_voidp ptr;
-   png_structp p=(png_structp)png_ptr;
-   png_uint_32 save_flags=p->flags;
+   png_structp p;
+   png_uint_32 save_flags;
    png_uint_32 num_bytes;
 
    if (png_ptr == NULL)
       return (NULL);
+
+   p=(png_structp)png_ptr;
+   save_flags=p->flags;
+
    if (items > PNG_UINT_32_MAX/size)
    {
      png_warning (p, "Potential overflow in png_zalloc()");
@@ -724,13 +728,13 @@ png_get_copyright(png_structp png_ptr)
 #else
 #ifdef __STDC__
    return ((png_charp) PNG_STRING_NEWLINE \
-     "libpng version 1.2.53beta02 - February 5, 2015" PNG_STRING_NEWLINE \
+     "libpng version 1.2.53beta02 - February 6, 2015" PNG_STRING_NEWLINE \
      "Copyright (c) 1998-2014 Glenn Randers-Pehrson" PNG_STRING_NEWLINE \
      "Copyright (c) 1996-1997 Andreas Dilger" PNG_STRING_NEWLINE \
      "Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc." \
      PNG_STRING_NEWLINE);
 #else
-      return ((png_charp) "libpng version 1.2.53beta02 - February 5, 2015\
+      return ((png_charp) "libpng version 1.2.53beta02 - February 6, 2015\
       Copyright (c) 1998-2014 Glenn Randers-Pehrson\
       Copyright (c) 1996-1997 Andreas Dilger\
       Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.");
diff --git a/pngget.c b/pngget.c
index cc824b39..8db1d247 100644
--- a/pngget.c
+++ b/pngget.c
@@ -1,7 +1,7 @@
 
 /* pngget.c - retrieval of values from info struct
  *
- * Last changed in libpng 1.2.53 [%RDATE%]
+ * Last changed in libpng 1.2.53 [February 6, 2015]
  * Copyright (c) 1998-2015 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 --git a/pngread.c b/pngread.c
index bbe015f6..2aee8ecc 100644
--- a/pngread.c
+++ b/pngread.c
@@ -1,7 +1,7 @@
 
 /* pngread.c - read a PNG file
  *
- * Last changed in libpng 1.2.53 [%RDATE%]
+ * Last changed in libpng 1.2.53 [February 6, 2015]
  * Copyright (c) 1998-2015 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 --git a/pngrtran.c b/pngrtran.c
index 0254d832..b7a74887 100644
--- a/pngrtran.c
+++ b/pngrtran.c
@@ -1,7 +1,7 @@
 
 /* pngrtran.c - transforms the data in a row for PNG readers
  *
- * Last changed in libpng 1.2.53 [%RDATE%]
+ * Last changed in libpng 1.2.53 [February 6, 2015]
  * Copyright (c) 1998-2015 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 --git a/pngrutil.c b/pngrutil.c
index 7c388635..bd517b13 100644
--- a/pngrutil.c
+++ b/pngrutil.c
@@ -1,7 +1,7 @@
 
 /* pngrutil.c - utilities to read a PNG file
  *
- * Last changed in libpng 1.2.53 [%RDATE%]
+ * Last changed in libpng 1.2.53 [February 6, 2015]
  * Copyright (c) 1998-2015 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.)
@@ -57,10 +57,10 @@ png_get_uint_31(png_structp png_ptr, png_bytep buf)
    png_uint_32 i = png_get_uint_32(buf);
 #else
    /* Avoid an extra function call by inlining the result. */
-   png_uint_32 i = ((png_uint_32)(*buf) << 24) +
-      ((png_uint_32)(*(buf + 1)) << 16) +
-      ((png_uint_32)(*(buf + 2)) << 8) +
-      ((png_uint_32)(*(buf + 3))     );
+   png_uint_32 i = ((png_uint_32)((*(buf    )) & 0xff) << 24) +
+                   ((png_uint_32)((*(buf + 1)) & 0xff) << 16) +
+                   ((png_uint_32)((*(buf + 2)) & 0xff) <<  8) +
+                   ((png_uint_32)((*(buf + 3)) & 0xff)      );
 #endif
    if (i > PNG_UINT_31_MAX)
      png_error(png_ptr, "PNG unsigned integer out of range.");
@@ -71,10 +71,10 @@ png_get_uint_31(png_structp png_ptr, png_bytep buf)
 png_uint_32 PNGAPI
 png_get_uint_32(png_bytep buf)
 {
-   png_uint_32 i = ((png_uint_32)(*buf) << 24) +
-      ((png_uint_32)(*(buf + 1)) << 16) +
-      ((png_uint_32)(*(buf + 2)) << 8) +
-      (png_uint_32)(*(buf + 3));
+   png_uint_32 i = ((png_uint_32)((*(buf    )) & 0xff) << 24) +
+                   ((png_uint_32)((*(buf + 1)) & 0xff) << 16) +
+                   ((png_uint_32)((*(buf + 2)) & 0xff) <<  8) +
+                   ((png_uint_32)((*(buf + 3)) & 0xff)      );
 
    return (i);
 }
@@ -86,10 +86,10 @@ png_get_uint_32(png_bytep buf)
 png_int_32 PNGAPI
 png_get_int_32(png_bytep buf)
 {
-   png_int_32 i = ((png_int_32)(*buf) << 24) +
-      ((png_int_32)(*(buf + 1)) << 16) +
-      ((png_int_32)(*(buf + 2)) << 8) +
-      (png_int_32)(*(buf + 3));
+   png_int_32 i = ((png_int_32)((*(buf    )) & 0xff) << 24) +
+                  ((png_int_32)((*(buf + 1)) & 0xff) << 16) +
+                  ((png_int_32)((*(buf + 2)) & 0xff) <<  8) +
+                  ((png_int_32)((*(buf + 3)) & 0xff)      );
 
    return (i);
 }
@@ -98,8 +98,8 @@ png_get_int_32(png_bytep buf)
 png_uint_16 PNGAPI
 png_get_uint_16(png_bytep buf)
 {
-   png_uint_16 i = (png_uint_16)(((png_uint_16)(*buf) << 8) +
-      (png_uint_16)(*(buf + 1)));
+   png_uint_16 i = ((png_uint_16)((*(buf     )) & 0xff) << 8) +
+                   ((png_uint_16)((*(buf +  1)) & 0xff)     );
 
    return (i);
 }
diff --git a/pngset.c b/pngset.c
index 6793787d..e2a12df5 100644
--- a/pngset.c
+++ b/pngset.c
@@ -1,7 +1,7 @@
 
 /* pngset.c - storage of image information into info struct
  *
- * Last changed in libpng 1.2.53 [%RDATE%]
+ * Last changed in libpng 1.2.53 [February 6, 2015]
  * Copyright (c) 1998-2015 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 --git a/pngwrite.c b/pngwrite.c
index 251ac552..3dce3d3c 100644
--- a/pngwrite.c
+++ b/pngwrite.c
@@ -1,7 +1,7 @@
 
 /* pngwrite.c - general routines to write a PNG file
  *
- * Last changed in libpng 1.2.53 [%RDATE%]
+ * Last changed in libpng 1.2.53 [February 6, 2015]
  * Copyright (c) 1998-2015 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 --git a/pngwutil.c b/pngwutil.c
index fa398353..8c94921f 100644
--- a/pngwutil.c
+++ b/pngwutil.c
@@ -1,7 +1,7 @@
 
 /* pngwutil.c - utilities to write a PNG file
  *
- * Last changed in libpng 1.2.53 [%RDATE%]
+ * Last changed in libpng 1.2.53 [February 6, 2015]
  * Copyright (c) 1998-2015 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.)