I still get "Connection error: can't connect to ethereum node" when redeeming winnings on "Will the price of ether be above $5 on February 29th?". I see the following in Chrome dev tools:
Failed to load resource: the server responded with a status of 500 (INTERNAL SERVER ERROR)
I have tried this in a new incognito window to be sure there is not an issue with chrome storage. I also tried it in Firefox and got the same error.