I've just started having this problem recently.

When I boot up, everything is working fine, and then after, so many minutes of use, XP will begin forgetting that some applications (eg. Winamp) are supposed to be ON TOP. Like, all I'm doing is using IE and surf around, and then I'll notice that Winamp (or ICQ, it doesn't matter what app) is behind the IE window. If I bring up a different app, it'll also show on top of Winamp/ICQ.

If I bring Winamp back in the foreground, and go back to IE, it'll work, but only for a couple minutes, and then it'll go back behind another window.

Anyone else have this problem? It's very annoying!

yep, hate that, Ill be typing in word and IE creeps up