One thing that is rly ****ing me off now is the random quits to desktop / stop responding. Three times now I have been hosting missions with mates, getting rly into it, only for my game to terminate. Am on vista64 but running in xp comp with -winxp command. Very frustrating.
I had to back of my cpu OC a tad even though it was fine with 12hrs of orthos. Arma2 sure gives your rig a good test for stability. The only thing that gets me down with this game at the moment is the amount of TK. I got TK by the same person 3 times. I think it might be usefull for a while to have a script line to remind newbie's to use there space bar to ID targats before letting rip.