Ditto what the last 2 guys said. I went ahead and bought a new remote. It wasn't the remote... BOTH remotes would lock up at the same time. With 2.0b11, The remote lockups seem to have gone away for me, though now I get more total input lockups. BTW, rebooting the player did NOT necessarily fix the problem when there was a lockup.
Anyway, I wanted 2 remotes regardless, one for each side of the car. (Or rather, 1 for me, 1 for everyone else to share.)