I tried again at home and it works ok, except that when exiting from the game, it hangs.
I got a crashed ‘Ddhelp’ (I sometimes have it too when exiting from open gl) and microsoft suggests that the videodriver is to be blamed for that.
(I got a gf4 with the latest drivers. I’m frankly a bit disappointed with nvidia that the drivers of a quite expensive videocard are so damn unstable. And BIG! I mean 15Mb for an unstable videodriver is NOT FUNNY, especially if you’re on dial-up like me. I tried several drivers and all seem to have different issues ).