In wxPython 2.5 can my mixins be new-style classes?

In wxPython 2.4, my mixin classes must be old-style (iow, they can't
descend from anything that descends from object). If I try to descend
from object, upon instantiation of my class there is output like the
following:

  File "/usr/lib/python2.3/site-packages/wxPython/windows.py", line 60, in _setOORInfo
    val = windowsc.wxEvtHandler__setOORInfo(self, *_args, **_kwargs)
TypeError: Type error in argument 1 of wxEvtHandler__setOORInfo. Expected _wxEvtHandler_p.

In wxPython 2.5, will I be able to use new-style Python classes
for my mixins?

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Paul