Index: /CKEditor/trunk/_source/plugins/image/dialogs/image.js
===================================================================
--- /CKEditor/trunk/_source/plugins/image/dialogs/image.js	(revision 6135)
+++ /CKEditor/trunk/_source/plugins/image/dialogs/image.js	(revision 6136)
@@ -1149,6 +1149,5 @@
 							setup : function( type, element )
 							{
-								if ( type == LINK )
-									this.setValue( element.getAttribute( 'target' ) );
+								this.setValue( element.getAttribute( 'target' ) || '' );
 							},
 							commit : function( type, element )