Hi, There's a line(#629) in AccessControl.User, within method validate(), saying: if emergency and user is emergency:.... I find out that, when I log in as emgergency user, 'user is emergency' always fails, even though logically user = emergency = self._emergency_user! I furthor discover that it seems to happen to all extention classes, i.e.: a = b = SomeExtentionClass() a is b will return 0. Well, this's not really a bug, since everything works fine, but there must be something wrong. Either a bug in extention class, or that line in user.py is useless. I'd like to hear some explanation. Cheers Dirksen __________________________________________________ Do You Yahoo!? Yahoo! Greetings - Send FREE e-cards for every occasion! http://greetings.yahoo.com