diff --git a/CHANGES b/CHANGES
index dde2af7bb..87eb16292 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().
@@ -2538,7 +2541,7 @@ version 1.4.2beta01 [April 1, 2010]
   Conditionally compile an "else" statement in png_decompress_chunk().
   Restored the macro definition of png_check_sig().
 
-version 1.4.2rc01 [April 10, 2010]
+version 1.4.2rc01 [April 14, 2010]
 
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