[jQuery] Safari/IE not working at all

[jQuery] Safari/IE not working at all

Hey all.
I have a bit of JQuery magic that works great in Firefox, but not in Safari or IE at all. Here's the code:
$(document).ready(
    function()
    {
        $('div.yui-u').Sortable({
            accept: 'sortable',
            helperclass: 'sortHelper',
            activeclass :     'sortableactive',
            hoverclass :     'sortablehover',
            handle: '
h3.list',
            tolerance: 'pointer',
        });
       
        $('h3.list').title('Click to expand; drag to reorganize')
        $('dl').hide();
        $('dd').hide();
        $('h3.list').click(function() {
            $(this.parentNode).find('dl').toggle('fast');
            $(this).toggleClass('listDown');
            return false;
        });
        $('li dl dt').click(function() {
            $(this.parentNode).find('dd').toggle('fast');
        });
    }
);
You can see it in action at <a href="http://www.eyeheartzombies.com/webpen-html/">
http://www.eyeheartzombies.com/webpen-html/</a> Any ideas?
Thanks a lot.<br clear="all">
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