I've had a problem only with the most recent Beta. Whenever I minimize the game by using the Windows key on my keyboard, I can restore it only by right-clicking on the minimized box and choosing "restore" from the menu. However, if I left-click on the box, it immediately gives me an "Invalid Call" error (No numbers, paths, or other detail) and the game closes completely. Also, the first method restores the game, but it takes a full 2 minutes or more on my Dell XPS machine with 2.5 gig processor and 1 gig of RAM. If this could somehow be speeded up it would be much more convenient. I accidentally killed the game a few times before I realized it needed the long restore time.
