[jhoffner]

Wow! We had no idea someone would be posting about us on HN today. We were not prepared. The site has been scaled up and it should working now.

UPDATE:

I was a bit hasty with my original comment. There was a regression bug that was still causing the landing page to be broken. A fix has been deployed and things should be working now.

[martin_]

I got to the final one then it just refreshes when I submit my solution (Note: I have to click JS rather than Submit or I get "Unknown Error").

[nathas]

Your script executor is still super busted. "Unknown error" for days.