Index: includes/bootstrap.inc
===================================================================
RCS file: /cvs/drupal/drupal/includes/bootstrap.inc,v
retrieving revision 1.271
diff -u -r1.271 bootstrap.inc
--- includes/bootstrap.inc	1 Mar 2009 09:32:17 -0000	1.271
+++ includes/bootstrap.inc	16 Mar 2009 08:46:51 -0000
@@ -1354,7 +1354,7 @@
           // If there are several arguments, we need to check the most
           // recently added one, i.e. the last one.
           $ip_address_parts = explode(',', $_SERVER['HTTP_X_FORWARDED_FOR']);
-          $ip_address = array_pop($ip_address_parts);
+          $ip_address = trim(array_pop($ip_address_parts));
         }
       }