Index: common.inc
===================================================================
--- common.inc	(revision 2653)
+++ common.inc	(working copy)
@@ -319,7 +319,7 @@
     $destination = $_REQUEST['edit']['destination'];
   }
 
-  if ($destination) {
+  if ($destination !== FALSE) {
     // Do not redirect to an absolute URL originating from user input.
     $colonpos = strpos($destination, ':');
     $absolute = ($colonpos !== FALSE && !preg_match('![/?#]!', substr($destination, 0, $colonpos)));