This is the error I got doing a search for "RS1800"
Might help.


Could not obtain topic ids

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 'GROUP BY p.topic_id' at line 5

SELECT p.topic_id FROM phpbb_posts p WHERE p.post_id IN (1855320, 1855478, 1855490, 1855498, 1855505, 1855521, 1855919, 1851544, 1858448, 1859418, 1865269, 1870305, 1332836, 1878538, 1879551) AND p.forum_id NOT IN (56, 37, 45, 51, 55, 54, 60, 66, 68) GROUP BY p.topic_id GROUP BY p.topic_id

Line : 443
File : /home/passionf/www/forum/search.php