Index: /CKEditor/trunk/_source/plugins/domiterator/plugin.js
===================================================================
--- /CKEditor/trunk/_source/plugins/domiterator/plugin.js	(revision 3853)
+++ /CKEditor/trunk/_source/plugins/domiterator/plugin.js	(revision 3854)
@@ -63,5 +63,7 @@
 				this._.lastNode = lastNode.getNextSourceNode( true );
 
-				if ( this._.lastNode.type == CKEDITOR.NODE_TEXT && !CKEDITOR.tool.trim( this._.lastNode.getText( ) ) )
+				if ( this._.lastNode &&
+						this._.lastNode.type == CKEDITOR.NODE_TEXT &&
+						!CKEDITOR.tool.trim( this._.lastNode.getText( ) ) )
 				{
 					// Special case for #3887: