Dear Dokuwiki users! It looks like the processing of ldap options has changed a bit in v2010-11-07 of DokuWiki. In my config file I had 'grouptree' defined, but not 'groupfilter'. Before it was not causing any troubles, as both options should be defined for group support to work: - if ($this->cnf['grouptree'] && $this->cnf['groupfilter']) { + if ($this->cnf['grouptree'] || $this->cnf['groupfilter']) { but in latest version if 'groupfilter' is not defined, the module prevents the authentication with this log: LDAP group search: Protocol error [ldap.class.php:226] LDAP search at: cn=groups,cn=centurion [ldap.class.php:227] LDAP: Reading group memberships failed It took me while before I realised what is causing "Protocol error". I think, if 'groupfilter' is required, the warning should be shown. -- With best regards, Dmitry -- DokuWiki mailing list - more info at http://www.dokuwiki.org/mailinglist