diff --git a/png.c b/png.c
index 8cb948dd1..b26863773 100644
--- a/png.c
+++ b/png.c
@@ -2093,7 +2093,7 @@ png_gamma_significant(png_fixed_point gamma)
  * 'num' 256 entry subtables, where 'num' is determined by 'shift' - the amount
  * to shift the input values right (or 16-number_of_signifiant_bits).
  *
- * The caller is respoonsible for ensuring that the table gets cleaned up on
+ * The caller is responsible for ensuring that the table gets cleaned up on
  * png_error (i.e. if one of the mallocs below fails) - i.e. the *table argument
  * should be somewhere that will be cleaned.
  */
diff --git a/scripts/pnglibconf.h.prebuilt b/scripts/pnglibconf.h.prebuilt
index 3d20f9603..a921aefcb 100644
--- a/scripts/pnglibconf.h.prebuilt
+++ b/scripts/pnglibconf.h.prebuilt
@@ -1,7 +1,9 @@
+
 /* libpng-1.5.0beta46 STANDARD API DEFINITION */
+
 /* pnglibconf.h - library build configuration */
 
-/* last changed in libpng version 1.5.0 - August 26, 2010 */
+/* libpng version 1.5.0beta46 - last changed on August 26, 2010 */
 
 /* Copyright (c) 1998-2010 Glenn Randers-Pehrson */
 
@@ -39,10 +41,11 @@
 #define PNG_WARNINGS_SUPPORTED
 #define PNG_FLOATING_ARITHMETIC_SUPPORTED
 #define PNG_WRITE_SUPPORTED
-#define PNG_WRITE_16BIT_SUPPORTED
 #define PNG_WRITE_INTERLACING_SUPPORTED
+#define PNG_WRITE_16BIT_SUPPORTED
 #define PNG_EASY_ACCESS_SUPPORTED
 #define PNG_ALIGN_MEMORY_SUPPORTED
+#define PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
 #define PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED
 #define PNG_USER_LIMITS_SUPPORTED
 #define PNG_FIXED_POINT_SUPPORTED
@@ -102,7 +105,7 @@
 #define PNG_READ_INT_FUNCTIONS_SUPPORTED
 #define PNG_READ_USER_CHUNKS_SUPPORTED
 #define PNG_READ_hIST_SUPPORTED
-#define PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
+#define PNG_READ_16BIT_SUPPORTED
 #define PNG_READ_SWAP_ALPHA_SUPPORTED
 #define PNG_READ_COMPOSITE_NODIV_SUPPORTED
 #define PNG_SEQUENTIAL_READ_SUPPORTED
@@ -138,6 +141,7 @@
 #define PNG_READ_INVERT_SUPPORTED
 #define PNG_READ_16_TO_8_SUPPORTED
 #define PNG_WRITE_cHRM_SUPPORTED
+#define PNG_16BIT_SUPPORTED
 #define PNG_WRITE_USER_TRANSFORM_SUPPORTED
 #define PNG_READ_BGR_SUPPORTED
 #define PNG_WRITE_PACKSWAP_SUPPORTED