? flag-user-access.patch
Index: flag.inc
===================================================================
RCS file: /cvs/drupal-contrib/contributions/modules/flag/Attic/flag.inc,v
retrieving revision 1.1.2.30.2.16
diff -u -p -r1.1.2.30.2.16 flag.inc
--- flag.inc	28 Oct 2009 02:38:10 -0000	1.1.2.30.2.16
+++ flag.inc	28 Oct 2009 07:27:00 -0000
@@ -404,7 +404,7 @@ class flag_flag {
       return FALSE;
     }
 
-    $matched_roles = array_intersect($this->roles[$action], array_keys($account->roles));
+    $matched_roles = !empty($this->roles[$action]) ? array_intersect($this->roles[$action], array_keys($account->roles)) : array();
     return !empty($matched_roles) || $account->uid == 1;
   }
 
@@ -615,7 +615,7 @@ class flag_flag {
    *
    * @private
    */
-  function _is_flagged($content_id, $uid, $sid) { 
+  function _is_flagged($content_id, $uid, $sid) {
     return db_result(db_query("SELECT fid FROM {flag_content} WHERE fid = %d AND uid = %d AND sid = %d AND content_id = %d", $this->fid, $uid, $sid, $content_id));
   }