The crash has happened at different stages of play, and at different locations. Today I found a similar crash with Breakout at St Lo, so I suspect there is something in my system, not the map.
I had to do the reinstall after last weekends WaW battle, when I could not join the tournament server. I could load a local server and run the tournament map, and I could load any public server. Now I'm baffled.
All this was preceded by installing Adobe Reader X - could there be a link? Nah, Adobe has to be trusted, right?