Index: system/system.install
===================================================================
--- system/system.install	(revision 50)
+++ system/system.install	(working copy)
@@ -403,7 +403,7 @@
   }
 
   db_query("INSERT INTO {permission} (rid, perm, tid) VALUES (%d, '%s', %d)", DRUPAL_ANONYMOUS_RID, 'access content', 0);
-  db_query("INSERT INTO {permission} (rid, perm, tid) VALUES (%d, '%s', %d)", DRUPAL_AUTHENTICATED_RID, 'access comments, access content, post comments, post comments without approval', 0);
+  db_query("INSERT INTO {permission} (rid, perm, tid) VALUES (%d, '%s', %d)", DRUPAL_AUTHENTICATED_RID, 'access comments, access content, post comments, post comments without approval, edit own comments', 0);
 
   db_query("INSERT INTO {variable} (name, value) VALUES ('%s', '%s')", 'theme_default', 's:7:"garland";');
 
Index: comment/comment.module
===================================================================
--- comment/comment.module	(revision 50)
+++ comment/comment.module	(working copy)
@@ -272,7 +272,7 @@
  * Implementation of hook_perm().
  */
 function comment_perm() {
-  return array('access comments', 'post comments', 'administer comments', 'post comments without approval');
+  return array('access comments', 'post comments', 'administer comments', 'post comments without approval','edit own comments');
 }
 
 /**
@@ -663,7 +663,7 @@
   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 == $comment->uid && comment_num_replies($comment->cid) == 0 && user_access('edit own comments'))|| user_access('administer comments');
   }
 }