I'm using zope (2.6 and python 2.2) with an existing python framework which use python's new style classes. Once new style classes correctly referenced by my products, and data pickled/unpickled properly, i can access to all methods and members but there's still a problem with properties. I have a instance of a new style class "A" with property "p" and method "m" which is "return self.p", referenced by a instance of a zope product "P". Getsetters of p are defined with docstrings. url : P/A/m and from pythonscript P.A.m() function as expected and print the value of p, but P/A/p and P.A.p return Unauthorized exceptions. Did I missed something ? PS : I have noticed a strange behavior of Extension Classes and an unexpected segmentation fault. It occurs when we use a reference to an Extension Class from a new style class, but not from the instances of that class, I didn't find any doc on the matter, is it a known bug ?