Comment 14 for bug 571743

I was able to upgrade by uninstalling mythbuntu-desktop.
Once upgraded, I had to use video safe mode until I installed the proprietary video drivers (ATI).
For some reason, if I want to add back mythbuntu-desktop, it wants to uninstall ubuntu-desktop.
I'm leaving mythbuntu-desktop off for now.
This upgrade has so far broken mythfrontend, and google earth, and I'm barely started testing.
This is not inspiring confidence.