Index: /CKEditor/trunk/CHANGES.html
===================================================================
--- /CKEditor/trunk/CHANGES.html	(revision 6253)
+++ /CKEditor/trunk/CHANGES.html	(revision 6254)
@@ -47,4 +47,5 @@
 		<li><a href="http://dev.ckeditor.com/ticket/5855">#5855</a> : Updating multiple times a full URL in a link generates wrong href.</li>
 		<li><a href="http://dev.ckeditor.com/ticket/6166">#6166</a> : Error on maximize command when the toolbar button is not shown.</li>
+		<li><a href="http://dev.ckeditor.com/ticket/6607">#6607</a> : Table cell "merge down" and "merge right" commands works only once.</li>
 	</ul>
 	<h3>
Index: /CKEditor/trunk/_source/plugins/tabletools/plugin.js
===================================================================
--- /CKEditor/trunk/_source/plugins/tabletools/plugin.js	(revision 6253)
+++ /CKEditor/trunk/_source/plugins/tabletools/plugin.js	(revision 6254)
@@ -465,11 +465,14 @@
 			try
 			{
+				var rowspan = parseInt( firstCell.getAttribute( 'rowspan' ), 10 ) || 1;
+				var colspan = parseInt( firstCell.getAttribute( 'colspan' ), 10 ) || 1;
+
 				targetCell =
 					map[ mergeDirection == 'up' ?
-							( startRow - 1 ):
-							mergeDirection == 'down' ? ( startRow + 1 ) : startRow  ] [
-						 mergeDirection == 'left' ?
-							( startColumn - 1 ):
-						 mergeDirection == 'right' ?  ( startColumn + 1 ) : startColumn ];
+							( startRow - rowspan ):
+							mergeDirection == 'down' ? ( startRow + rowspan ) : startRow  ] [
+						mergeDirection == 'left' ?
+							( startColumn - colspan ):
+						mergeDirection == 'right' ?  ( startColumn + colspan ) : startColumn ];
 
 			}