diff --git a/CHANGES b/CHANGES
index 80690e11e..56b386fa0 100644
--- a/CHANGES
+++ b/CHANGES
@@ -2054,7 +2054,10 @@ version 1.4.0beta46 [December 10, 2008]
     PNG_TRANSFORM_STRIP_FILLER (Jim Barry).
 
 version 1.4.0beta47 [December 15, 2008]
-  Turned off PNG_READ_DITHER_SUPPORTED by default.
+  Support for dithering was removed by default, because it has never
+    been well tested and doesn't work very well.  The code has not
+    been removed, however, and can be enabled by building libpng with
+    PNG_READ_DITHER_SUPPORTED defined.
 
 version 1.4.0beta48 [February 14, 2009]
   Added new exported function png_calloc().
@@ -2608,7 +2611,7 @@ version 1.5.0beta15 [March 17, 2010]
   Removed makefile.mingw.
   Eliminated PNG_NO_EXTERN and PNG_ALL_EXTERN
 
-version 1.5.0beta16 [April 1, 2010]
+version 1.5.0beta16 [April 14, 2010]
   Make png_text_struct independent of PNG_iTXt_SUPPORTED, so that
     fields are initialized in all configurations.  The READ/WRITE
     macros (PNG_(READ|WRITE)_iTXt_SUPPORTED) still function as