Index: /CKEditor/trunk/CHANGES.html
===================================================================
--- /CKEditor/trunk/CHANGES.html	(revision 4528)
+++ /CKEditor/trunk/CHANGES.html	(revision 4529)
@@ -76,4 +76,5 @@
 		<li><a href="http://dev.fckeditor.net/ticket/4584">#4584</a> : Fixed updated link Target field is not updating when updating to certian values.</li>
 		<li><a href="http://dev.fckeditor.net/ticket/4603">#4603</a> : Fixed unable to disable submenu items in contextmenu.</li>
+		<li><a href="http://dev.fckeditor.net/ticket/4672">#4672</a> : Fixed unable to redo the insertion of horizontal line.</li>
 	<h3>
 		CKEditor 3.0.1</h3>
Index: /CKEditor/trunk/_source/plugins/horizontalrule/plugin.js
===================================================================
--- /CKEditor/trunk/_source/plugins/horizontalrule/plugin.js	(revision 4528)
+++ /CKEditor/trunk/_source/plugins/horizontalrule/plugin.js	(revision 4529)
@@ -12,4 +12,5 @@
 	var horizontalruleCmd =
 	{
+		canUndo : false,    // The undo snapshot will be handled by 'insertElement'.
 		exec : function( editor )
 		{