Index: /CKEditor/trunk/_source/core/skins.js
===================================================================
--- /CKEditor/trunk/_source/core/skins.js	(revision 3289)
+++ /CKEditor/trunk/_source/core/skins.js	(revision 3290)
@@ -133,5 +133,9 @@
 			loaded[ skinName ] = skinDefinition;
 
-			skinDefinition.skinPath = paths[ skinName ];
+			skinDefinition.skinPath = paths[ skinName ]
+				|| ( paths[ skinName ] = 
+						CKEDITOR.getUrl(
+							'_source/' +	// %REMOVE_LINE%
+							'skins/' + skinName + '/' ) );
 		},