Index: flag.module
===================================================================
RCS file: /cvs/drupal-contrib/contributions/modules/flag/Attic/flag.module,v
retrieving revision 1.11.2.72.2.22
diff -u -r1.11.2.72.2.22 flag.module
--- flag.module	28 Oct 2009 02:38:10 -0000	1.11.2.72.2.22
+++ flag.module	29 Oct 2009 05:04:16 -0000
@@ -698,7 +698,7 @@
   // Restrict access by comment authorship.
   if ($flag->content_type == 'comment') {
     $comment = _comment_load($content_id);
-    $node = node_load($content_id);
+    $node = node_load($comment->nid);
     if ($flag->access_author == 'node_own' && $node->uid != $account->uid) {
       return FALSE;
     }