I was trying to update my auth system after upgrading to Weatherwax. I use phpCAS to authenticate and this plugin used to rely on ldap plugin. So I thought I'd re-implement the same system. My new authcas plugin extends authldap and from there everything seems to go fine except that when _openLDAP method is fired from getUserData, it first tries to retrieve it's conf. Problem is, it actually tries to retrieve $conf['plugin']['authcas'][...] and not $conf['plugin']['authldap'][...]. That's fine if you update your conf and change all the conf but it shouldn't react this way. getConf should be able to determine which class is calling the method and not which plugin is used.
For the record : PHP 5.4.15 on Centos 6
My authcas class is attached if it helps....