diff --git a/ANNOUNCE b/ANNOUNCE
index 83068a7..db5d9c1 100644
--- a/ANNOUNCE
+++ b/ANNOUNCE
@@ -25,7 +25,7 @@
 
 Changes since the last public release (1.6.0):
 
-Version 1.6.1 [February 16, 2013]
+Version 1.6.1beta01 [February 16, 2013]
   Made symbol prefixing work with the ARM neon optimizations. Also allow
     pngpriv.h to be included for preprocessor definitions only, so it can
     be used in non-C/C++ files. Back ported from libpng 1.7.
diff --git a/CHANGES b/CHANGES
index 94d56f1..5b712d0 100644
--- a/CHANGES
+++ b/CHANGES
@@ -3672,7 +3672,8 @@
   No changes.
 
 Version 1.5.7beta01 [November 4, 2011]
-  Added support for ARM processor (Mans Rullgard)
+  Added support for ARM processor, when decoding all PNG up-filtered rows
+    and any other-filtered rows with 3 or 4 bytes per pixel (Mans Rullgard).
   Fixed bug in pngvalid on early allocation failure; fixed type cast in
     pngmem.c; pngvalid would attempt to call png_error() if the allocation
     of a png_struct or png_info failed. This would probably have led to a
@@ -4381,7 +4382,7 @@
 Version 1.6.0 [February 14, 2013]
   No changes.
 
-Version 1.6.1 [February 16, 2013]
+Version 1.6.1beta01 [February 16, 2013]
   Made symbol prefixing work with the ARM neon optimizations. Also allow
     pngpriv.h to be included for preprocessor definitions only, so it can
     be used in non-C/C++ files. Back ported from libpng 1.7.
diff --git a/arm/arm_init.c b/arm/arm_init.c
index 3a3e86e..2042180 100644
--- a/arm/arm_init.c
+++ b/arm/arm_init.c
@@ -3,7 +3,7 @@
  *
  * Copyright (c) 2013 Glenn Randers-Pehrson
  * Written by Mans Rullgard, 2011.
- * Last changed in libpng 1.5.14 [(PENDING RELEASE)]
+ * Last changed in libpng 1.5.15 [%RDATE%]
  *
  * This code is released under the libpng license.
  * For conditions of distribution and use, see the disclaimer
@@ -56,7 +56,7 @@
 #include <elf.h>
 #include <asm/hwcap.h>
 
-/* A read call may be interupted, in which case it returns -1 and sets errno to
+/* A read call may be interrupted, in which case it returns -1 and sets errno to
  * EINTR if nothing was done, otherwise (if something was done) a partial read
  * may result.
  */
diff --git a/pngpriv.h b/pngpriv.h
index 8d3905c..d58b22d 100644
--- a/pngpriv.h
+++ b/pngpriv.h
@@ -1892,7 +1892,8 @@
 #endif /* SIMPLIFIED READ/WRITE */
 
 #ifdef PNG_FILTER_OPTIMIZATIONS
-PNG_INTERNAL_FUNCTION(void, PNG_FILTER_OPTIMIZATIONS, (png_structp png_ptr, unsigned int bpp), PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void, PNG_FILTER_OPTIMIZATIONS, (png_structp png_ptr,
+    unsigned int bpp), PNG_EMPTY);
    /* This is the initialization function for hardware specific optimizations,
     * one implementation (for ARM NEON machines) is contained in
     * arm/filter_neon.c.  It need not be defined - the generic code will be used
diff --git a/pngrutil.c b/pngrutil.c
index e660757..dd997ea 100644
--- a/pngrutil.c
+++ b/pngrutil.c
@@ -1,8 +1,8 @@
 
 /* pngrutil.c - utilities to read a PNG file
  *
- * Last changed in libpng 1.6.0 [(PENDING RELEASE)]
- * Copyright (c) 1998-2012 Glenn Randers-Pehrson
+ * Last changed in libpng 1.6.0 [February 14, 2013]
+ * Copyright (c) 1998-2013 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/pngstruct.h b/pngstruct.h
index b8202d1..a9bd7ab 100644
--- a/pngstruct.h
+++ b/pngstruct.h
@@ -471,6 +471,7 @@
 /* New member added in libpng-1.5.6 */
    png_bytep big_prev_row;
 
+/* New member added in libpng-1.5.7 */
    void (*read_filter[PNG_FILTER_VALUE_LAST-1])(png_row_infop row_info,
       png_bytep row, png_const_bytep prev_row);