official jQuery file causing error on Line: 4075, help?

Question

UPDATE: It seems like it is blowing up on this line:

$('#ytplayerid').load('test.php?track=' + single);

the contents of test.php are:

<script type="text/javascript">
    // <![CDATA[
    // allowScriptAccess must be set to allow the Javascript from one 
    // domain to access the swf on the youtube domain
    var params = { allowScriptAccess: "always", bgcolor: "#cccccc" };
    // this sets the id of the object or embed tag to 'ytplayerid'.
    // You then use this id to access the swf and make calls to the player's API
    var atts = { id: "ytplayerid" };
    swfobject.embedSWF("http://www.youtube.com/v/&lt;?php echo $_GET['track']; ?>?border=0&amp;enablejsapi=1&amp;playerapiid=ytplayer&amp;autoplay=1&showinfo=0","ytplayerid", "180", "145", "8", null, null, params, atts);
    //]]>
</script>

My web applications works perfect in Chrome, Safari, and FF; however, IE works the first time you click play all or when you click play a track to play and then throws an error:

Message: Invalid argument. Line: 4075 Char: 5 Code: 0 URI: http://code.jquery.com/jquery-latest.js

http://thinkitpostit.com/tubalr/playlist.php?playlist_id=25 Thats a link to a playlist of mine you can create your own by registering and logging in :)

Any help resolving this problem will be greatly appreciated.

I'm not sure if my code is causing this or what but I will post my JS:

    <script type="text/javascript"> 
        $(document).ready(function() {
            $('#addbutton').click(function() {
                $('#addform').slideToggle('slow')
            });

            $('.show').mouseover(function() {
                $(this).children(".hide").css("display", "inline");
            }).mouseout(function() { 
                $(this).children(".hide").css("display", "none");
            });
        });

        var tracks = new Array();
        var numoftracks;
        var currenttrack;
        var repeat = "off";
        var playingSingle;
        var single;
        function playTrack(track) {
            $('.hrshow').show();
            single = track;
            playingSingle = "yes";
            $('#ytplayerid').load('test.php?track=' + single);
        }
        function playPlaylist(trackstemp) {
            $('.hrshow').show();
            playingSingle = "no"
            trackstemp = trackstemp.split(' ');
            for (i=0; i < trackstemp.length; i++){
                tracks[i] = trackstemp[i];
            }
            numoftracks = tracks.length - 1;
            currenttrack = 0;
            $('#ytplayerid').load('test.php?track=' + tracks[currenttrack]);
        }
        function onYouTubePlayerReady(playerId) {
            ytplayer = document.getElementById("ytplayerid");
            ytplayer.addEventListener("onStateChange", "onytplayerStateChange");
        }
        function onytplayerStateChange(newState) {
            if (newState == 0) {
                if (playingSingle == "no") {
                    currenttrack += 1;
                    if ((currenttrack == numoftracks) && (repeat == "on")) {
                        currenttrack = 0;
                        $('#ytplayerid').load('test.php?track=' + tracks[currenttrack]);
                    }
                    else {
                        $('#ytplayerid').load('test.php?track=' + tracks[currenttrack]);
                    }
                }
                if ((playingSingle == "yes") && (repeat == "on")) {
                    $('#ytplayerid').load('test.php?track=' + single);                      
                }
            }
        }
        function toggleRepeat() {
            if (repeat == "off") {
                $('#repeatimg').attr("src","design/repeaton.png");
                repeat = "on";
            }
            else {
                $('#repeatimg').attr("src","design/repeatoff.png");
                repeat = "off";
            }
        }
    </script>