Yesterday evening:

New site on Chrome was able to look up all rates, but kept logging me out every few minutes (while I was in the middle of trying to book!).

Old site on Firefox kept me logged in, but refused to show me an actual list of hotels when searching on rewards nights. It would show the number of hotels, and then some garbage message which didn't apply (like no hotels in the town I searched in, when there are, and it says "34 hotels found" right above that!).

I haven't had the energy to try again yet today...