I suspect something is going terribly wrong with the "FCurve/Driver Version fix script", or simply with the backward compatibility handle. It's not hard to manually re-do the animation, but I would rather find the source of the problem, so we make sure we don't run into that for other not-so trivial animations
Bug reported upstream: https://developer.blender.org/T42512 (see the link for more details).
I will see if Joshua can look at it, otherwise I may give it a go.
I suspect something is going terribly wrong with the "FCurve/Driver Version fix script", or simply with the backward compatibility handle. It's not hard to manually re-do the animation, but I would rather find the source of the problem, so we make sure we don't run into that for other not-so trivial animations
File start_menu.blend