Index: /CKEditor/trunk/_source/core/editor.js
===================================================================
--- /CKEditor/trunk/_source/core/editor.js	(revision 4870)
+++ /CKEditor/trunk/_source/core/editor.js	(revision 4871)
@@ -28,9 +28,11 @@
 	var loadConfig = function( editor )
 	{
-		var customConfig = CKEDITOR.getUrl( editor.config.customConfig );
+		var customConfig = editor.config.customConfig;
 
 		// Check if there is a custom config to load.
 		if ( !customConfig )
 			return false;
+
+		customConfig = CKEDITOR.getUrl( customConfig );
 
 		var loadedConfig = loadConfigLoaded[ customConfig ] || ( loadConfigLoaded[ customConfig ] = {} );