Comment 7 for bug 554676

That appears to have fixed it.

Investigating mythbuntu-default-settings
Package mythbuntu-default-settings has broken dep on mythbuntu-artwork-usplash
  Considering mythbuntu-artwork-usplash 1 as a solution to mythbuntu-default-settings 3
  Added mythbuntu-artwork-usplash to the remove list
  Fixing mythbuntu-default-settings via remove of mythbuntu-artwork-usplash

But there are more in the apt.log. New bug https://bugs.launchpad.net/ubuntu/+source/mythbuntu-meta/+bug/558956