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Changes between Initial Version and Version 1 of Ticket #22447, comment 8

initial	v1
1	1	It doesn't work in the `mttp` case because they skip `ModelBase.__new__` [https://github.com/django-mptt/django-mptt/blob/master/mptt/models.py#L217-L218 here], it would work if they called `super(MPTTModelBase, cls).__new__` instead.
2	2
3		Unsure how to deal correctly with this. [https://bitbucket.org/gutworth/six/issue/66/replace-the-implementation-of I've proposed] `six` to replace their `with_metaclass` implementation with [https://github.com/mitsuhiko/flask/blob/6ec83e18dca497a8fbfca6caca5999984bd32f2e/flask/_compat.py#L56-L73 the one Flask uses] in order to prevent those `NewBase` artifacts. I ran the full ~~test suite with this modified version~~ and it fully passed.
	3	Unsure how to deal correctly with this. [https://bitbucket.org/gutworth/six/issue/66/replace-the-implementation-of I've proposed] `six` to replace their `with_metaclass` implementation with [https://github.com/mitsuhiko/flask/blob/6ec83e18dca497a8fbfca6caca5999984bd32f2e/flask/_compat.py#L56-L73 the one Flask uses] in order to prevent those `NewBase` artifacts. I ran the full Django test suite with this modified version and the `NewBase` hacks removed and it fully passed.
4	4
5	5	Fixing the issue at this level makes more sense me than trying to work around it by `__mro__` and `__dict__` checks.