Проблемы глюки и прочие непонятки

[Самогон]

Не все так просто как кажется на первый взгляд

SELECT postid
                        FROM vb_post AS post
                        INNER JOIN vb_thread AS thread ON(thread.threadid = post.threadid)
                        WHERE post.userid = ххх
                                AND thread.forumid IN(1,2,4,19,25,26,27,28,29,30,34,37,38,42,11,46,47,10,12,21,41,35,32,31,33,15,40,18,22,23,24,43,49,13,36,14,6,7,8,5,39,48,44,45)
                        ORDER BY post.dateline DESC
                        LIMIT 1000;