[Eep, I used a bookmarklet to submit this to Hacker News and didn't notice that it submitted it with "?action=upvote" in the query string (how I first reached the page because I clicked the upvote link when I got the blog post in my inbox).

So now it looks like the CodeCombat blog is doing some crazy spammy thing with popups when you hit the site. Could a moderator fix the URL?]