Looks like you found a pretty serious bug. Please file an issue and I will work on it.
In the meantime, try loading this page agian without any browser extensions/plugins. That can be done with an "incognito" or "private"* tab.
Otherwise, though I want to support all browsers/systems/people (that's the promise of the web, after all) try using Google Chrome / Chromium. If you're not already.