Quote from Nutshot on the 19th of June 2010:
Ok Further problems.
Getting a lot of CTD's. There seems to be a known bug that when you get your first killstreak it drops people back to desktop. I have noticed that this only happens to me on the insurgent side, and not the US.
I am thinking it has something to do with the loud sound effect that plays when you get the first killstreak.
I have only CTD once and it was unrelated to loud sounds. So far i'm not having any problems with it.