This has been an issue for at least 12 hours now. There are several errors in the js bundle === bad build. Firebug console is showing various syntax errors and undefined var assignments.
Then again, it could be a simple data entry error. I’m looking at the German version and there’s an unescaped double quote in a moustache template:
“Wem soll ich folgen ansehen.”
,
Which of course will screw up all the JS on the site. Duh!
It’s really strange that they haven’t fixed it yet, maybe the global cache hasn’t been cleared yet?