/usr/lib/python2.6/dist-packages/ffc/tensor/tensorreordering.py is in python-ffc 1.0.0-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/python2.6/dist-packages/ffc/tensor/../../../../../share/pyshared/ffc/tensor/tensorreordering.py