Hi Mathieu,
The problem of the update from 1.6.4 to 1.6.5 is not with REGEXP itself but with the Cloze (multianswer) question, which I have had to modify to make it compliant with REGEXP. If you do a
CVS upgrade from 1.6.4 to 1.6.5, you will get a warning telling you that CVS has not been able to automatically merge the previous version of \question\type\multianswer\questiontype.php with the new one. I've just done the upgrade and this is what I get:
<<<<<<< questiontype.php
<?php // $Id: questiontype.php,v 1.7.2.8 2006/11/26 21:59:23 skodak Exp $
=======
<?php // $Id: questiontype.php,v 1.7.6.1 2007/03/25 14:49:59 moodler Exp $
>>>>>>> 1.7.6.1
I will try to produce a new version of my modified \question\type\multianswer\questiontype.php file compatible with Moodle 1.6.5 and post it here (and in the plugins area of Moodle).
Joseph