Index: modules/comment/comment.module
===================================================================
RCS file: /cvs/drupal/drupal/modules/comment/comment.module,v
retrieving revision 1.822
diff -u -p -r1.822 comment.module
--- modules/comment/comment.module	26 Dec 2009 16:50:08 -0000	1.822
+++ modules/comment/comment.module	30 Dec 2009 10:44:26 -0000
@@ -292,6 +292,9 @@ function comment_permission() {
     'post comments without approval' => array(
       'title' => t('Post comments without approval'),
     ),
+    'edit own comments' => array(
+      'title' => t('Edit own comments'),
+    ),
   );
 }
 
@@ -1256,7 +1259,7 @@ function comment_access($op, $comment) {
   global $user;
 
   if ($op == 'edit') {
-    return ($user->uid && $user->uid == $comment->uid && comment_num_replies($comment->cid) == 0) || user_access('administer comments');
+    return ($user->uid && $user->uid == $comment->uid && user_access('edit own comments')) || user_access('administer comments');
   }
 }