Index: _source/plugins/tabletools/plugin.js
===================================================================
--- _source/plugins/tabletools/plugin.js	(revision 5853)
+++ _source/plugins/tabletools/plugin.js	(working copy)
@@ -423,7 +423,13 @@
 		{
 			var row = tableMap[ r ];
 			if ( typeof cell == 'undefined' )
+			{
 				oCol.push( row[ colIndex ] );
+
+				if ( row[ colIndex ].rowSpan > 1 )
+					r += row[ colIndex ].rowSpan - 1;
+			}
+
 			else if ( cell.is && row[ colIndex ] == cell.$ )
 				return r;
 			else if ( r == cell )