Hello. I used the software update manager in 10.04 LTS to upgrade to 12.04 LTS. It seemed to be going fine until it got to the clean-up phase. Either just before or just after the clean-up phase (I couldn't tell if it reached completion), the upgrade status window disappeared and was replaced by an unreadable prompt. The prompt had a red X graphic in it on the upper left, and a button on the lower right. All the text and labels were unreadable: just square blocks. I took a chance and clicked the button which caused the prompt to disappear but nothing else happened. The shutdown menu was in the "reboot required" state so I rebooted. Everything seems okay at the moment, but I've only just started to check things out. I'm a little concern about the way the upgrade ended as it appeared to abort during clean-up so I don't know if it reached a point where it should have started auto-configuring. Any suggestions? In any case, this is a bug that should be fixed.
As an aside, I'm not sure I like the new interface but I'm willing to give it a try - my immediate first impression is: great, look at all those icons, but what happened to the convenient menu to pull down my list of favourite places, the menu for all the programs, and what!?: no bar at the bottom to manage a list of open windows?!