I think the following qualifies as a bug; I think the 
call to super(C, self).m() should cause an exception 
(the super_getattro search should not find the m in A 
if an m is defined in B):

>>> class A(object):
...     def m(self):
...         print 'A'
...
>>> class B(A):
...     m = property(lambda self: 'B')
...
>>> class C(B):
...     def m(self):
...         super(C, self).m()
...         print 'C'
...
>>> c = C()
>>> c.meth()
A
C