Yep, sorry for late reply on this one, but this problem only affected the setup in the first hour or so of installs before I fixed it. I suppose that's the busiest hour though since we do all the facebook/twitter promo as soon as it goes up. In future if I do that again I'll try to make it clearer that it's been updated, sorry for the confusion.
tl;dr download r77 again and it should work