MySQL Error!
------------------------

The Error returned was:
Illegal argument to a regular expression.

Error Number:
3685

SELECT SQL_CALC_FOUND_ROWS id, autor, date, short_story, SUBSTRING(full_story, 1, 15) as full_story, xfields, title, category, tags, alt_name, comm_num, allow_comm, allow_rate, rating, vote_num, news_read, flag, editdate, editor, reason, view_edit FROM dle_post WHERE category regexp '[[:<:]](33)[[:>:]]' AND approve ORDER BY date DESC LIMIT 0,25