Hmmm... i don't really know. Given my permanent brick of it from trying to downgrade to 3.52, i don't have any idea whether you can downgrade to 1.50 safely either... of course, it could of been a one off fluke that i bricked, but would you take that chance?

If someone has a pandora working, maybe they could test downgrading to another firmware on 3.71 M33; apart from 3.52 which bricked me? Well, i could test it for you but im not at home/no access to a charger and my battery is only 50% so :S

But I'll give it a go when i can and get back to you, incase you don't find a way yet or if nobody else helps by then. Goodluck and get back to us; otherwise I'll let you know how i go. Peace.