Disqus, Javascript, iPhone display error

Site: https://hotcakes.fm

I’ve just installed Disqus, it works fine except it interfered with the post ticker on the front page and displayed an error message relating to this part of the code:

<script type="text/javascript">
    // <![CDATA[
        var disqus_shortname = '<?php echo strtolower(get_option('disqus_forum_url')); ?>';
        var disqus_domain = '<?php echo DISQUS_DOMAIN; ?>';
        (function () {
            var nodes = document.getElementsByTagName('span');
            for (var i = 0, url; i < nodes.length; i++) {
                if (nodes[i].className.indexOf('dsq-postid') != -1) {
                    nodes[i].parentNode.setAttribute('data-disqus-identifier', nodes[i].getAttribute('rel'));
                    url = nodes[i].parentNode.href.split('#', 1);
                    if (url.length == 1) { url = url[0]; }
                    else { url = url[1]; }
                    nodes[i].parentNode.href = url + '#disqus_thread';
                }
            }
            var s = document.createElement('script'); s.async = true;
            s.type = 'text/javascript';
            s.src = 'https://' + disqus_domain + '/forums/' + disqus_shortname + '/count.js';
            (document.getElementsByTagName('HEAD')[0] || document.getElementsByTagName('BODY')[0]).appendChild(s);
        }());
    //]]>
    </script>

I fixed it by ticking the option to output the Javascript in the footer. All good. But now when I browse the said on my iPhone, the post ticker has stopped functioning. There’s no error message, it just doesn’t display correctly.

Any ideas? I’m not sure if this is a Safari-related issue but I’d imagine it’s not.