Admins! Bug en la web :(

Cuando me quiero unir a una comunidad me sale el siguiente error.

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

The Error returned was:
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 '50' at line 1

Error Number:
1064

SELECT SQL_CALC_FOUND_ROWS id, autor, date, short_story, SUBSTRING(full_story, 1, 15) as full_story, xfields, title, category, alt_name, comm_num, allow_comm, allow_rate, rating, vote_num, news_read, points, favoritos, flag, editdate, editor, reason, view_edit, tags FROM dle_post WHERE approve AND allow_main AND date < '2010-03-10 15:50:40' ORDER BY date DESC LIMIT ,50