Game crashes when ending mission

[heemle 0]

This crash is very annoying. Happened in my original version 1.04 (UK) and happens again now with 1.05.

First time in the first sniper mission, now after tank training.

After quitting the mission or ending it, the game gets stuck in the loading screen, there wouldn't be such a big problem if the game would crash normally, but my version doesn't end. Not even if I try to end the process from task manager in windows. It never ends. I have to reboot the computer to get rid of it.

I got Windows XP SP2. Arma.exe is occupying 600mb of ram and is not responding.

What could result in this behaviour? I've got a dualscreen setup, but only other screen is used for ArmA. The primary screen is useless, because its now occupied by the loading screen, until I reboot of course.