Index: search.php
===================================================================
--- search.php	(revision 9411)
+++ search.php	(working copy)
@@ -366,8 +366,9 @@
 				else
 				{
 					$sql = 'SELECT t.topic_id
-						FROM ' . TOPICS_TABLE . ' t
-						WHERE t.topic_last_post_time > ' . $user->data['user_lastvisit'] . '
+						FROM ' . TOPICS_TABLE . ' t, ' . POSTS_TABLE . ' p
+						WHERE p.post_time > ' . $user->data['user_lastvisit'] . '
+							AND t.topic_id = p.topic_id
 							AND t.topic_moved_id = 0
 							' . str_replace(array('p.', 'post_'), array('t.', 'topic_'), $m_approve_fid_sql) . '
 							' . ((sizeof($ex_fid_ary)) ? 'AND ' . $db->sql_in_set('t.forum_id', $ex_fid_ary, true) : '') . "