Code running for admins only

I have a simple jquery script in HFCM which I have used for quite a while on many sites. As of this week sometime, on some sites but not others, this code only runs when I am logged in to the admin. When I view the site as a visitor it does not run. An example of the code I am using in HFCM is:

<!-- JQUERY SCROLL TRIGGERS -->
<script >
	   jQuery(document).ready(function($) {		   
		   jQuery(document).scroll(function(){
			//alert ("scrolled");
			  $('#menu-main').toggleClass('scrolled', $(this).scrollTop() > 50);
 		});
    });
</script>
<!-- END JQUERY SCROLL TRIGGERS -->

Any thoughts on how I could fix or troubleshoot this further? Thanks!

The page I need help with: [log in to see the link]