[Zope] Subclassing User

[ingo]

Hi!

Can anybody tell me anything about subclassing a UserObject?
I have had some neat errors (including seg-faults and indefinite loops by just subclassing a ZClass from User Object)
When I tried to insantiate a Subclass of UserObject Zope quit.
(I did not change anything to the default constructors and expected something like "missing argument", but not an indefinite loop :)

I am using Zope 2.1.4 on Linux/x86 (2.2.13)

Thanks.

Regards, Ingo.