On GF240M it can't switch the resolution properly: first it goes fullscreen as expected, but after few seconds it comes back to the resolution a desktop was in - and as a result the game is in something similar to the windowed mode, while beneath you can see your desktop. Even if I set my desktop to the in-game resolution, Windows' taskbar is on-top through a game.
BTW, version is 1.2.
PS.
Normally, in other games, if such a thing happens, the solution was to alt-tab away and then back. Here it would work also, as the resolution becomes proper, but... rendering is broken and the screen is black, no matter how long I'd wait.