sebek: Thankyou! It turns out I also had a '(autoload 'python-mode "python-mode" "Python editing mode." t)' in my ~/.emacs, and removing it removed this mysterious problem.
sebek: Thankyou! It turns out I also had a '(autoload 'python-mode "python-mode" "Python editing mode." t)' in my ~/.emacs, and removing it removed this mysterious problem.