Flew into combat with another player attacking our friendly LARGE airfield. The game locked up suspiciously at the same time that all the field ack was firing at the attacker. My framerates had also taken a huge drop.
Fault offset: 0x00019803
Game locked, and was only able to regain response from my computer accessing the task manager Alt, Cntrl, Del keyboard stroke, and even then it took some time and a second keyboard command to access the task manager.
My uneducated guess is there is a connection to the "ack" and proximity to it.
Edit: I just had a second event. This time it was a straight up CTD (crash to desktop). This time flying dead six of burning B29s firing (tracers visible) and CTD occurred just after I had taken the wing off the burning bomber and possibly it was exploding (only had a split second view of large debris).