Re: Anyone else using QEMU/KVM for testing?
For what it's worth, I've installed Kubuntu in a VM and it's running very nicely. No graphics problems of the sort that were showing up with standard Ubuntu. It does seem that Gnome 3 might be the problem.
BACKUPS are unsexy — until you discover you should have done one yesterday.
Spare your nerves and do one before you upgrade or install.