--- httpbl.module	2008-04-29 21:18:35.000000000 +0200
+++ httpbl.module	2009-09-12 13:40:34.000000000 +0200
@@ -631,7 +631,7 @@
 function _httpbl_check() {
   global $user;
 
-  if (variable_get('httpbl_check', 0) < 2 || (variable_get('httpbl_check', 0) == 2 && $user)) {
+  if (variable_get('httpbl_check', 0) < 2 || (variable_get('httpbl_check', 0) == 2 && $user->uid)) {
     // Only check when 'for all users' or 'for all anonymous users' is set
     return;
   }