diff -r 1dfd2013e9a8 -r 35a5442f6950 friendfeed.module
--- a/friendfeed.module	Sun Oct 12 22:16:45 2008 +0200
+++ b/friendfeed.module	Mon Oct 13 00:54:18 2008 +0200
@@ -157,6 +157,10 @@ function friendfeed_block($op = 'list', 
         else {
           return array();
         }
+      } else {
+        $user = user_load(array("name"=>$username));
+		if ($user === FALSE or $user->friendfeed_username != $username)
+			unset($user);
       }
       $limit = variable_get('friendfeed_block_limit', 3);
       $service = variable_get('friendfeed_block_service', NULL);