I have LDAP Auth against Win2k AD on a Moodle 1.5.2 +
In Phone1, Phone2 and Address fields, I have the Update External option set to On Update.
When updating user profiles, and if any of these fields is empty, gives me an error:
Warning: ldap_modify(): Modify: Invalid syntax in /var/www/moodle/auth/ldap/lib.php on line 850.
And doesn't empty the fields in Win2k AD.