I just distro upgraded to 12.04. I hoped that this time I won't have to suffer a whole night to get everything working, but my hopes were shot down quite quickly.

The UI in 12.04 is seriously broken, and I don't know why. The Unity animations are slow or not there at all. The Launcher reacts only like every third time I try to get it to show (I have it on auto-hide). Neither the application switcher (alt-tab) nor the workspace switcher look as they should. I can't take a screenshot of either. The app switcher only looks bad (like a Win98 default skin), it works. The workspace switcher (Expo) doesn't really. It opens without animation, and all the windows are displayed on the workspace in a grid, not just the top one. They can't be moved either. It also seems to ignore my settings that there should be 2*3 (total 6) workspaces, and only displays 5.

I get the feeling that this is due to some config clash from the upgrade. Is there any way I can fix it? If there's a way to nuke all settings or the whole gui and reinstall it clean and clear, I'm fine with that too.