Having the same problem here running under WinXP Pro. I installed it under the admin account and it works perfectly. Then installed it under the other accounts on this machine (6 accounts total)and all of them have corrupt graphics.
Well, maybe corrupt isn't the right description... All the window backgrounds are black. All the text is black, almost everything is black, menu bars, vis window, media pane... can't see anything.
I've tried completely uninstalling MJ and deleting the program files dir, and deleting all registry entries. Then reinstalled .302, and restored the license on all accounts but, to no avail. The other accounts can't use it.
I just downloaded the latest WHQL video drivers from nVidia for my GF2, but I don't think it's a video driver issue.
If you guys can help me out with this little 'snag', then this will be the best media program ever installed on this machine!