[Zope] problem with new style classes in zope

[Maric MICHAUD]

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 ?