I will surely switch to 4.0 after the weekend, but the deadline for the competition I'm participating at is tomorrow, so 3.7 will have to do just for now.
I'm testing on diverse hardware configs, xp, 7, netbook, high-end pc but there seems to be no rule. The animation data is not big, but the crashes happen on scenes where I make heavy use of the set animation position action with large one frame "animations". Could you see something in the dump file?