MySQL error in file: /engine/modules/emoticon.php at line 234

Error Number: 3685

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

SQL query:

SELECT DISTINCT p.id, p.autor, p.date, p.short_story, CHAR_LENGTH(p.full_story) as full_story, p.xfields, p.title, p.category, p.alt_name, p.comm_num, p.allow_comm, p.fixed, p.tags, e.news_read, e.allow_rate, e.rating, e.vote_num, e.votes, e.view_edit, e.editdate, e.editor, e.reason FROM dle_post p LEFT JOIN dle_post_extras e ON (p.id=e.news_id) LEFT JOIN dle_post_emoticon_search t ON (p.id=t.news_id) WHERE emoticon_ids regexp '[[:<:]](5)[[:>:]]' AND category regexp '[[:<:]](21)[[:>:]]' LIMIT 0,30