Index: /CKEditor/trunk/CHANGES.html
===================================================================
--- /CKEditor/trunk/CHANGES.html	(revision 5236)
+++ /CKEditor/trunk/CHANGES.html	(revision 5237)
@@ -65,4 +65,5 @@
 		<li><a href="http://dev.fckeditor.net/ticket/5118">#5118</a> : Arrow keys navigation in RTL languages is incorrect.</li>
 		<li><a href="http://dev.fckeditor.net/ticket/4721">#4721</a> : Remove attribute 'value' of checkbox in IE.</li>
+		<li><a href="http://dev.fckeditor.net/ticket/5278">#5278</a> : IE: Add validation to check for bad window names of popup window.</li>
 	</ul>
 	<h3>
Index: /CKEditor/trunk/_source/plugins/link/dialogs/link.js
===================================================================
--- /CKEditor/trunk/_source/plugins/link/dialogs/link.js	(revision 5236)
+++ /CKEditor/trunk/_source/plugins/link/dialogs/link.js	(revision 5237)
@@ -782,5 +782,5 @@
 										data.target = {};
 
-									data.target.name = this.getValue();
+									data.target.name = this.getValue().replace(/\W/gi, ''); 
 								}
 							}