[jmedinger]

The error is a 500 Internal Server Error with the following javascript error.

Firebug reports the javascript error to be

$(document).bind('pagechangefailed', function() {
  console.log('pagechangefailed');
});
$( document ).bind('pageloadfailed', function( event, data ){
  console.log('pageloadfailed');

although how this is related to the addition of a product tab on the desktop templates is beyond me!
See Firebug screenshot here http://dev.growhigh.co.uk/images/error.jpg