Index: includes/stream_wrappers.inc
===================================================================
RCS file: /cvs/drupal/drupal/includes/stream_wrappers.inc,v
retrieving revision 1.20
diff -u -r1.20 stream_wrappers.inc
--- includes/stream_wrappers.inc	17 Aug 2010 22:05:22 -0000	1.20
+++ includes/stream_wrappers.inc	9 Sep 2010 00:39:14 -0000
@@ -752,7 +752,7 @@
    */
   function getExternalUrl() {
     $path = str_replace('\\', '/', $this->getTarget());
-    return $GLOBALS['base_url'] . '/' . self::getDirectoryPath() . '/' . drupal_encode_path($path);
+    return $GLOBALS['base_url'] . '/' . $this->getDirectoryPath() . '/' . drupal_encode_path($path);
   }
 }