README.rdoc in writeexcel-0.6.8 vs README.rdoc in writeexcel-0.6.9

@@ -75,9 +75,12 @@
 You must save source file in UTF8 and run ruby with -Ku option or set $KCODE='u'
 when use urf8 string data.
 
 == Recent Changes
 
+v0.6.9
+* Bug fix. When sheetname is cell's A1 notation such as 'D1', Worksheet#autofilter causes exception.
+
 v0.6.8
 * Bug fix. Worksheet#protect doesn't work well.
 
 v0.6.7
 * Bug fix. Worksheet#set_first_sheet doesn't work well.