Index: /CKEditor/trunk/_source/plugins/richcombo/plugin.js
===================================================================
--- /CKEditor/trunk/_source/plugins/richcombo/plugin.js	(revision 6334)
+++ /CKEditor/trunk/_source/plugins/richcombo/plugin.js	(revision 6335)
@@ -132,4 +132,5 @@
 				{
 					this.setState( this.modes[ editor.mode ] ? CKEDITOR.TRISTATE_OFF : CKEDITOR.TRISTATE_DISABLED );
+					this.setValue( '' );
 				},
 				this );