Index: modules/node/node.module
===================================================================
RCS file: /cvs/drupal/drupal/modules/node/node.module,v
retrieving revision 1.947.2.11
diff -u -p -r1.947.2.11 node.module
--- modules/node/node.module	25 Jun 2008 08:59:57 -0000	1.947.2.11
+++ modules/node/node.module	16 Jan 2009 11:24:01 -0000
@@ -2129,6 +2129,10 @@ function node_access_view_all_nodes() {
   static $access;
 
   if (!isset($access)) {
+    if (!module_implements('node_grants')) {
+      $access = TRUE;
+      return $access;
+    }
     $grants = array();
     foreach (node_access_grants('view') as $realm => $gids) {
       foreach ($gids as $gid) {