/usr/lib/python2.7/dist-packages/ipython-0.13.1.egg-info is in ipython 0.13.1-2+deb7u1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/python2.7/dist-packages/../../../share/pyshared/ipython-0.13.1.egg-info