Snap - a few seconds ago, I was diving on a B-24 in my F4U-1, and splat, back to the desktop. The bomber pilot must have thought I had gone mental. I have it on film. The odd thing is that my last recorded speed was 324mph, and I had exceeded this beforehand, although in a gentle dive. When the game crashed, I was going straight down. Perhaps it is something to do with acceleration?
For the record I am using a fresh install of Aces High, which never ever crashed with the previous version of the game; I have flown longer sorties. The only aircraft in the vicinity were two remaining B-24s and a 110; I have "disable other plane skins" turned on.