MRO error

[reduxdj]

Traceback (most recent call last):
File "./listsurf.py", line 10, in
from handlers import (AccountLoginHandler,
File "/Users/dj/listsurf/handlers.py", line 11, in
from brubeck.models import User
File "/Users/dj/.virtualenvs/listsurf/lib/python2.7/site-packages/brubeck-0.4.0-py2.7.egg/brubeck/models.py", line 97, in
class UserProfile(Model, OwnedModelMixin, StreamedModelMixin):
File "build/bdist.macosx-10.7-intel/egg/schematics/models.py", line 146, in new

TypeError: Error when calling the metaclass bases
Cannot create a consistent method resolution
order (MRO) for bases Model, StreamedModelMixin, OwnedModelMixin

[reduxdj]

same as:

from brubeck.models import UserProfile

gives me this:
class UserProfile(Model, OwnedModelMixin, StreamedModelMixin):
File "/Users/dj/.virtualenvs/listsurf/lib/python2.7/site-packages/schematics/models.py", line 146, in new
klass = type.new(cls, name, bases, attrs)
TypeError: Error when calling the metaclass bases
Cannot create a consistent method resolution
order (MRO) for bases StreamedModelMixin, OwnedModelMixin, Model

[reduxdj]

The Model Mixins should come out of brubeck...