3.2 sucked. It was OK at first, then it screwed up the recording of the last day of Pedal to Paris (it got the mileage right, but the track stops way out- oh, and apparently there was only 15 mins riding time!) and recorded another couple of rides without the track at all, though again mileage was OK. So reverted to 3.1, which has behaved so far.
Related note: Any way to get the 705 to see my whole ride history again?