sudo pip uninstall PIL
sudo pip install pillow
^^ fixed it for me.
Pillow is a fork of PIL that is compatible with pip/setuptools and gets a little better maintenance. I haven't seen any API differences yet.
Edit: There is one notable API difference. PIL exposes Image as a top-level namespace, so you can
import Image # in PIL only
but
from PIL import Image # in pillow or PIL
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