We have the following installation
- Moodle 1.9.11 (Build:20110221)
- PHP 5.1.6
- RedHat 5
The Latex Filter basically works but some codes are not rendered i.e "\bigl" or "\langle". Furthermore some codes are indicated as 'forbiddenkeyword' i.e "\mbox".
Trying texdebug.php says: "Could not delete DB cache_filters entry for W=\\bigl \\langle...". Here you can see that slahes ("\") have been added. We cannot delete the database entries for this expressions.