--- og_user_roles.module.070605.orig	2007-06-05 16:24:54.000000000 -0700
+++ og_user_roles.module	2007-06-06 01:28:34.000000000 -0700
@@ -642,6 +642,10 @@ function og_user_roles_init ()
 {
 	// Looking for this format: http://www.scbbs.com/node/add/link?gids[]=29
 
+    if (!function_exists('arg')){
+		drupal_bootstrap(DRUPAL_BOOTSTRAP_PATH); // added as per this issue: http://drupal.org/node/149469
+    }
+
 	if (arg(0) == 'node' && arg(1) == 'add' && isset($_REQUEST['gids'])) {
 		$gids = $_GET['gids'];
 	    $gid = intval(current($_REQUEST['gids']));