I did take it to the local dealer. The latch mechanism looked OK and the service guy pointed out the sticker on the back of the bag that warns to double check bag for proper latching....so most likely it wasn't latched correctly which is why it fell off. However it was properly locked when attached and such a mechanism should be failsafe not to lock if the latch is not secure. This is simply poor engineering/design if you ask me. On my previous bike, a 1995 ST1100, there was no way you could lock the saddlebag if it wasn't securely latched down.