Message1349

I've actually looked at this a little bit.  __new__ is indeed called, but the dict passed in is ignored because the metatype is an instance of PyTypeDerived.  __spam__ is in the dict of the PyType, but because __dict__ is assignable in all Derived classes with a dict instance, the dict there in PyTypeDerived hides the one in PyType.  It's been a couple weeks since I touched this, but I should have some time in the coming week to get back to it and see if I had a suitable resolution.