Comment 6 for bug 438791

nvidia-common is indeed not installed. I don't recall uninstalling it, but I won't claim I didn't. I have been upgrading since Edgy or Feisty (don't remember). Also, I sometimes turn off the option to install recommended packages by default when I think there are huge amounts of packages I don't need.

I'll install nvidia-common and see if that works, when I get home tonight.