preg_replace() error when viewing /event

First, I'll list versions in case they might be part of the problem:

basicevent -- $Id: basicevent.module,v 1.7.2.1 2006/05/08 20:55:21 killes Exp $
event -- $Id: event.module,v 1.183.2.4 2006/05/11 08:28:27 killes Exp $
drupal -- 4.7.2
apache -- 1.3.36
php -- 4.4.2
mysql -- 5.0.21-standard

Now, on to the error: Whenever I go to /event on my site, I get the following error:

    * warning: preg_replace(): Unknown modifier '\' in /---path-to-site-root---/includes/database.inc on line 283.
    * user warning: Query was empty query: in /---path-to-site-root---/includes/database.mysql.inc on line 120.
    * user warning: 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 'LIMIT 0, 10' at line 1 query: LIMIT 0, 10 in /---path-to-site-root---/includes/database.mysql.inc on line 120.

I have no clue as to why this error is happening. Has anyone seen anything similar?