I posted a reply to a thread in the Poser Forum; just a paragraph of text, and what happened was all replies to the OP (including mine) disappeared, and the following message appeared above the thread:

mysql error: 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 '== 'active' ORDER BY post_date LIMIT 0,29' at line 4, occured in query: "SELECT t.*, m.username, m.date_first_logon AS joined, m.location AS user_location, m.avatar_url AS avatar, u.posts AS user_posts, u.last_post AS user_last_post, u.signature AS user_signature FROM forumpro_message t LEFT OUTER JOIN member m ON t.user_id=m.userid LEFT OUTER JOIN forumpro_user u ON t.user_id=u.user_id WHERE t.thread_id='2642018' AND t.status == 'active' ORDER BY post_date LIMIT 0,29;".