I'm beginning to wonder if Logitech Setpoint could be doing it. You'd think mouse drivers from Logitech wouldn't be prone to such a lame issue, but who knows. I know another guy that used to have the issue, and he thinks he has Setpoint installed. I was able to duplicate the problem on a near fresh install of XP 64-bit; just drivers, virtual drive, AnyDVD, probably Firefox, and old versions of mIRC and Textpad. I'm also curious as to why no balloon tips appear on mouseover of the taskbar, system tray, etc anymore. I kind of liked when I could mouseover the clock to see the date. I that some side effect of using the classic theme or part of my weird bug?