It's broken for me too. I can almost pin point the time it's broken since. On Wednesday after the server reset it was running fine for a few hours, until the evening the F2 started to become "loading" forever. It has been broken since.
I sent in tickets and they have asked me to sending DxDiag and HiJackThis log. After that they still couldn't find anything wrong and asked further for lots of Internet/server/router/modem type of specification and setup as well as a log from an internet monitoring program. It is still on-going.
My computer hasn't been doing any major (or even minor) modification/updates for recent days and the F2 just failed to function all of the sudden (in the same day it was still functional a few hours ago on Wednesday, Oct. 20).
I even tried to system revert to last week, nothing works so far. I started to think it's on the server side and it effects only a portion of accounts (although not everone, but I can see now I am not alone).
Best,