Finalise -duplicate option

diff --git a/ChangeLog b/ChangeLog
index 9eab4df..e45cf0d 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+2011-03-23 6.6.8-7 Anthony Thyssen <A.Thyssen@griffith...>
+  * Another fix for -sparse-color and unused color channels
+  * Finialize the -duplicate option created by Cristy
+
 2011-03-21  6.6.8-7 Glenn Randers-Pehrson <glennrp@image...>
   * Revised the PNG8 encoder to use 50% threshold instead of 0% when
     reducing transparency to binary.  Collapse all resulting fully transparent
@@ -5,9 +9,6 @@
   * First try the 4-4-4 and 3-3-3 palettes instead of 3-3-2, to preserve
     colors (especially gray) better, when reducing to PNG8.
 
-2011-03-18 6.6.8-7 Anthony Thyssen <A.Thyssen@griffith...>
-  * Another fix for -sparse-color and unused color channels
-
 2011-03-21  6.6.8-6 Cristy  <quetzlzacatenango@image...>
   * New version 6.6.8-6.