/usr/lib/python2.6/dist-packages/zope.publisher-3.12.6-nspkg.pth is in python-zope.publisher 3.12.6-2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/python2.6/dist-packages/../../../share/pyshared/zope.publisher-3.12.6-nspkg.pth