finally i found this topic, i thought i was the only one having this problem.
i am using 5.531 lite, i used earlier w5 versions too, they also had this issue. i was a happy w2.95 user, then i wanted to try this "new thing", but this random focus problem annoys me.
1) if winamp is running, but there are maximized or windowed apps in front of it (so winamp is not visible) i click on the taskbar to get the winamp window, and sometimes it brings up only the playlist window (i use winamp with main+playlist window only, no eq, no ML, classic skin).
2) if winamp is running but there is a windowed app covering some parts of winamp, i usually click on the playlist window, and that will randomly bring the main+playlist window to front or just the playlist window to front. i dont really understand the second behavior. and i don't see why it happens, so i can only say its random, but its not rare, and its very annoying. please fix it.