PresenceAccount subclasses called PresenceAccount.get_register_fields but the "cls" parameter was always PresenceAccount. Now subclasses pass a "real_class" parameter which contains the class type on which get_register_fields was called. darcs-hash:20070325122936-86b55-fb6db014fbdeaa2fa1a423b935df5e72ffe6a20a.gz