I have some weird problems with minimizing and restoring to a  running program tray. I have this issue with Windows Media Player and  VLC. When minimizing them, they slowly minimize to the tray - taking  almost two seconds - you can just watch the open windows shrink slowly  to the bar. On restoring, basically the same thing a slow return to the  original size, however after the slow  restore completes, Windows Media  Player will essentially restore again at the correct speed (it sort of  does a quick blink. These are the only two applications so far that have  this problem.
 
Vista 32, Dell XPS420 Quadcore