Hope someone will be able to help me :-) please please. I have this error on my site in the forums:

Could not retrieve related topics information

DEBUG MODE

SQL Error : 1064 You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ') LIMIT 1' at line 9

SELECT DISTINCT(t.topic_id) FROM nuke_bbsearch_wordmatch m, nuke_bbposts p, nuke_bbtopics t WHERE t.topic_id <> 5283 AND t.topic_status <> 2 AND p.topic_id = t.topic_id AND p.post_id = m.post_id AND p.forum_id IN (1, 2, 4, 5, 6, 7, 8, 9, 10, 11, 12, 16, 39, 22, 23, 27, 31, 32, 33, 34, 36, 37, 38, 40, 41, 42, 43) AND m.title_match = 1 AND m.word_id IN () LIMIT 1

Line : 92
File : /home/admin/public_html/includes/functions_related.php

In addition, the users cannot sign up as the security tag is not working. Anyone know what the problem maybe and how to fix it. Thanks, in advance xxxx