When I pull up Chrome's J-console, I'm getting this error:
Uncaught TypeError: Object [object Object] has no method 'on' front-subscribers.js:1
(anonymous function) front-subscribers.js:1
I've then also noticed that when on a mobile device (the site is responsive), the menu toggle is no longer working and I'm thinking it has something to do with this error.
I'm using WordPress 3.5, with a child-theme based off of the Theme-ID Responsive theme, and using Ubermenu plug-in for the menu.