CO Pro 3.6 occationally crashed when

I've just upgraded to Capture One Pro 3.6. I am using Win XP sp2. My camera is Canon 10D. The 3.6 crashed occasionally when prcess photo with unconstrained crop. Not all photo, but it can be any photo. When it crashed it will keep on crashing on that photo until crop is removed. I am going to downgrade for now. Does anyone experience this problem?