I got my 2010 trim level 3 Prius about a month ago and haven't had time to go back to the dealer yet but has anyone else had this problem and how was it fixed? Basically, the pad keeps coming off and I finally left it off until I bring the car in for service.
I found mine on the floor and put it back on. If it comes off again, I will either get a warranty repair or put some "Goop" on it (then it is not going anywhere!)
I kicked mine off just once in 7 weeks. Put it back on, and so far it's stayed on. I do try to be gentle in setting and releasing the parking brake.