Index: typo3/sysext/rtehtmlarea/htmlarea/plugins/TableOperations/table-operations.js
===================================================================
--- typo3/sysext/rtehtmlarea/htmlarea/plugins/TableOperations/table-operations.js	(revision 9982)
+++ typo3/sysext/rtehtmlarea/htmlarea/plugins/TableOperations/table-operations.js	(working copy)
@@ -1018,7 +1018,7 @@
 			for (var k = tableParts.length; --k >= 0;) rows[k] = [];
 			var row = null;
 			var cells = null;
-			if (Ext.isGecko) {
+			if (false && Ext.isGecko) {
 				try {
 					while (range = sel.getRangeAt(i++)) {
 						var td = range.startContainer.childNodes[range.startOffset];
@@ -1041,7 +1041,7 @@
 					Ext.MessageBox.alert('', this.localize("Please click into some cell"));
 					break;
 				}
-				var tr = cell.parentElement;
+				var tr = cell.parentNode;
 				var no_cols = parseInt(prompt(this.localize("How many columns would you like to merge?"), 2));
 				if (!no_cols) break;
 				var no_rows = parseInt(prompt(this.localize("How many rows would you like to merge?"), 2));