Index: /CKEditor/branches/versions/3.3.x/CHANGES.html
===================================================================
--- /CKEditor/branches/versions/3.3.x/CHANGES.html	(revision 5468)
+++ /CKEditor/branches/versions/3.3.x/CHANGES.html	(revision 5469)
@@ -74,6 +74,7 @@
 		<li><a href="http://dev.fckeditor.net/ticket/4797">#4797</a> : [Opera] Press enter key in dialog fields to close cause JavaScript error.</li>
 		<li><a href="http://dev.fckeditor.net/ticket/5578">#5578</a> : Add flash fake element align property when switch mode (source to wysiwyg).</li>
-		<li><a href="http://dev.fckeditor.net/ticket/5577">#5578</a> : Update delete column behavior when choose mutiple cells in the same column.</li>
-		<li><a href="http://dev.fckeditor.net/ticket/5577">#5562</a> : [IE] Unable to have "contentEditable:false" in effect in IE8 stricts mode.</li>
+		<li><a href="http://dev.fckeditor.net/ticket/5577">#5577</a> : Update delete column behavior when choose mutiple cells in the same column.</li>
+		<li><a href="http://dev.fckeditor.net/ticket/5562">#5562</a> : [IE] Unable to have "contentEditable:false" in effect in IE8 stricts mode.</li>
+		<li><a href="http://dev.fckeditor.net/ticket/5660">#5660</a> : [Firefox] Native error when focus an maximized editor.</li>
 	</ul>
 	<h3>
Index: /CKEditor/branches/versions/3.3.x/_source/plugins/maximize/plugin.js
===================================================================
--- /CKEditor/branches/versions/3.3.x/_source/plugins/maximize/plugin.js	(revision 5468)
+++ /CKEditor/branches/versions/3.3.x/_source/plugins/maximize/plugin.js	(revision 5469)
@@ -81,4 +81,10 @@
 	function refreshCursor( editor )
 	{
+		// Refresh 'contentEditable' otherwise
+		// DOM lifting breaks design mode. (#5560) 
+		var body = editor.document.getBody();
+		body.setAttribute( 'contentEditable', false );
+		body.setAttribute( 'contentEditable', true );
+
 		if ( editor.focusManager.hasFocus )
 		{