Index: /CKEditor/trunk/_source/plugins/selection/plugin.js
===================================================================
--- /CKEditor/trunk/_source/plugins/selection/plugin.js	(revision 4337)
+++ /CKEditor/trunk/_source/plugins/selection/plugin.js	(revision 4338)
@@ -679,5 +679,5 @@
 						node = sel.anchorNode;
 
-						if ( node.nodeType != 1 )
+						if ( node && node.nodeType != 1 )
 							node = node.parentNode;
 					}