This is such a minor quibble that I hate to even bring it up, but the more I see it, the more I realize how annoying it is:

When Fusion 2.0rc1 starts my Windows XP guest, the window resizes two or three times as it goes through POST and then Windows startup. And I could swear - is this even possible? - that I see a "glitch" line on the screen, like you'd see on an old multisync monitor as it switched sync frequencies.

It's purely cosmetic, and it's not an action that I have to repeat a lot, but it just feels... rough. And Parallels doesn't do this. If I were to install trial versions of both programs, I'd tend to assume that VMWare was the less stable of the two. Which is most definitely NOT the case!