Index: includes/common.inc
===================================================================
RCS file: /cvs/drupal/drupal/includes/common.inc,v
retrieving revision 1.921
diff -u -p -r1.921 common.inc
--- includes/common.inc	10 Jun 2009 20:00:10 -0000	1.921
+++ includes/common.inc	11 Jun 2009 15:13:02 -0000
@@ -3131,7 +3131,7 @@ function drupal_clear_js_cache() {
  */
 function drupal_to_js($var) {
   // json_encode() does not escape <, > and &, so we do it with str_replace()
-  return str_replace(array("<", ">", "&"), array('\x3c', '\x3e', '\x26'), json_encode($var));
+  return str_replace(array("<", ">", "&"), array('\u003c', '\u003e', '\u0026'), json_encode($var));
 }
 
 /**