/usr/lib/python2.6/dist-packages/ffc/plot.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/../../../../share/pyshared/ffc/plot.py
/usr/lib/python2.6/dist-packages/ffc/../../../../share/pyshared/ffc/plot.py