Warning on wiki editing

[strk]

Got this on "Submit" after editing a wiki page:

Warning: preg_match() [function.preg-match]: Unknown modifier 'p' in /var/www/mediawiki-1.15.2/includes/EditPage.php on line 1086

Wiki page was:

 http://wiki.osgeo.org/index.php?title=IRC&action=submit

[martin]

A quick test (at the end of the mentioned page) didn't reveal any trouble. Could you probably go into detail about the content of your intended edit ?

Martin.

[strk]

The edit worked fine (added link to #drupal-geo irc channel, see history).

The warning didnt' prevent it, just came out on the captcha page, so maybe you need to add an external link for it to come out (which asks to pass the captcha test)