- Fixed 64-bit compatibility issues for Python 2.5.x / 2.6.x. See http://www.python.org/dev/peps/pep-0353/ for details.
2.12.1
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- Update for iteration proxying: The proxy for `__iter__` must not rely on the object to have an `__iter__` itself, but also support fall-back iteration via `__getitem__` (this fixes https://bugs.launchpad.net/zope2/+bug/360761).