I got this error in wordpress after some reconfiguring of my web hosting today.
Warning: preg_match() [function.preg-match]: No ending delimiter '!' found in /home/7864/domains/tyman.net/html/wp/wp-includes/classes.php on line 1499
You can view it at http://www.tyman.net.
I looked at the code, although my php knowledge is pretty shallow, I couldn't see anything wrong with it.
Thanks for your help in advance.