2 CTDs.
First one had just opened radio to type message while flying in the middle of the big lake with nobody nearby, CTD.
Second was near the fringe of a big furball and got another CTD.
Both were after about 20-30 min of flying with no other noticable glitches. System temperatures seemed ok before running AH2 and after the CTDs.
For both of these, the windows error catcher thingy noticed and sent the crash report to MS, but the crash reporter window disappeared before I could tell it to give me the dump data.
After the second one, I restarted AH and flew for another half hour in a big furball without another dump.