Index: /CKEditor/trunk/CHANGES.html
===================================================================
--- /CKEditor/trunk/CHANGES.html	(revision 5777)
+++ /CKEditor/trunk/CHANGES.html	(revision 5778)
@@ -100,4 +100,5 @@
 		<li><a href="http://dev.fckeditor.net/ticket/5193">#5193</a> : In Firefox, the element path options had the text cursor instead of the arrow.</li>
 		<li><a href="http://dev.fckeditor.net/ticket/6073">#6073</a> : The list context menu was showing the wrong option when in a mixed list hierarchy.</li>
+		<li><a href="http://dev.fckeditor.net/ticket/6074">#6074</a> : The Insert Table Column command was duplicating the selected column cells ids.</li>
 		<li>Updated the following language files:<ul>
 			<li>Chinese Simplified;</li>
Index: /CKEditor/trunk/_source/plugins/tabletools/plugin.js
===================================================================
--- /CKEditor/trunk/_source/plugins/tabletools/plugin.js	(revision 5777)
+++ /CKEditor/trunk/_source/plugins/tabletools/plugin.js	(revision 5778)
@@ -235,5 +235,5 @@
 				continue;
 
-			cell = new CKEDITOR.dom.element( $row.cells[ cellIndex ].cloneNode( false ) );
+			cell = ( new CKEDITOR.dom.element( $row.cells[ cellIndex ] ) ).clone( false );
 
 			if ( !CKEDITOR.env.ie )