We're talking about Ubuntu here - that was my point.
I've been upgrading Ubuntu Desktop for years (a decade, singular) and I've always been struggling - especially if I ventured to install an alpha and then keep upgrading that. Compared to OS X, on which I always upgrade to the first Developer Preview and keep upgrading on, although OS X comes with problems, too, the GM usually fixes it all up. With Ubuntu, it's best to script your environment and rebuild clean. At least my experience. Garbage always piles up otherwise!
