Superb plugin, so far!

Whenever I open a .py file, I get an error message:

Error detected while processing /home/martin/mbrochh-dotfiles/.vim/bundle/python-mode/ftplugin/python/lint.vim:
line 62:
No config file found, using default configuration

After that, the actual file is opened. It's a bit annoying... what config file is missing and where do I have to put it?

Thanks a lot!
Martin