Uncaught TypeError: undefined is not a function

I'm not sure why this wasn't a problem in the past, but: when doing a fresh install of Spark and looking at the front page with the anonymous user, I get the above error.

The cause is $(function () { Drupal.aloha.init(); });, the root cause is Drupal.aloha.init() not dealing well with the case of it not receiving a callback function.