Looks like the search needs to escape the search parameters '(' ')'...
See:
http://dev.mysql.com/doc/refman/5.6/...t-boolean.html
Code:
Database error in vBulletin 4.2.2:
Invalid SQL:
SELECT
COUNT(imageid) AS imagecount
FROM dbtech_gallery_images
WHERE
instanceid = 1 &&
approved = 1 &&
deleted = 0 &&
MATCH
(title, text, tagging, username)
AGAINST
('+Bourke(NSW)* +Simga* +10-20mm* +Nikon* +D800E* ' IN BOOLEAN MODE);
MySQL Error : syntax error, unexpected '+', expecting FTS_TERM or FTS_NUMB or '*'
Error Number : 1064