I'm using Chrome and having the same issue as the OP was with the "City" blank not populating or being able to dropdown. Needless to say I haven't gotten very far.
ETA: Third browser is the charm. Chrome and IE didn't work for my but Firefox at least let me get registered.
ETA 2: OK now I'm stuck at the "Pay" screen. It's just a blank window with one button that says "Close". Ug
I am SO close!
ETA 3: Got it! Only had to go back and forth between my Laptop, Tablet and iPhone and use 4 different browsers but I finally submitted.
I think.