title: Jquery sortable errors in IE
body: <p>Getting some rather unusual errors when sorting in IE 7 and 8 (works fine in 9).</p>
  
  <p><a href="http://jsfiddle.net/pC5qg/" rel="nofollow">http://jsfiddle.net/pC5qg/</a></p>
  
  <p>Jquery:</p>
  
  <pre><code>$(".first, .second, .third").sortable({
      update : function (event, ui) {
  
          var listItem = $(this).sortable('toArray');
          var string = "navOrder=1&amp;listItem=" + listItem;
  
      }
  });   
  </code></pre>
  
  <p>HTML:</p>
  
  <pre><code>&lt;ul class="first"&gt;
    &lt;li id="4"&gt;Learn More About The Law
      &lt;ul class="second"&gt;
        &lt;li id="49"&gt;ACA Overview&lt;/li&gt;
        &lt;li id="45"&gt;Timelines
          &lt;ul class="third"&gt;
            &lt;li id="31"&gt;Already in Effect&lt;/li&gt;
            &lt;li id="55"&gt;2012 Timeline&lt;/li&gt;
            &lt;li id="56"&gt;2013 Timeline&lt;/li&gt;
            &lt;li id="57"&gt;2014 Timeline&lt;/li&gt;
            &lt;li id="58"&gt;2015 and on&lt;/li&gt;
          &lt;/ul&gt;
        &lt;/li&gt;
      &lt;/ul&gt;
    &lt;/li&gt;
    &lt;li id="2"&gt;How Will Reform Affect Me?
      &lt;ul class="second"&gt;
        &lt;li id="32"&gt;I Have a Pre-existing Condition&lt;/li&gt;
        &lt;li id="47"&gt;I Have Medicare
          &lt;ul class="third"&gt;
            &lt;li id="54"&gt;Medicare Insert&lt;/li&gt;
            &lt;li id="20"&gt;Overview of Medicare Changes&lt;/li&gt;
            &lt;li id="21"&gt;Medicare Advantage Plans&lt;/li&gt;
            &lt;li id="22"&gt;Medicare Part D&lt;/li&gt;
          &lt;/ul&gt;
        &lt;/li&gt;
        &lt;li id="50"&gt;I Have Insurance
          &lt;ul class="third"&gt;
            &lt;li id="51"&gt;I Have Insurance From My Employer&lt;/li&gt;
            &lt;li id="52"&gt;I Buy My Own Insurance&lt;/li&gt;
          &lt;/ul&gt;
        &lt;/li&gt;
        &lt;li id="48"&gt;Small Businesses
          &lt;ul class="third"&gt;
            &lt;li id="42"&gt;Small Business Tax Credits&lt;/li&gt;
            &lt;li id="28"&gt;Grants for Small Business Wellness Programs&lt;/li&gt;
            &lt;li id="27"&gt;Free Choice Voucher&lt;/li&gt;
          &lt;/ul&gt;
        &lt;/li&gt;
        &lt;li id="53"&gt;Large Businesses
          &lt;ul class="third"&gt;
            &lt;li id="38"&gt;Large Employer Insurance Requirement&lt;/li&gt;
            &lt;li id="39"&gt; Am I a Large Employer?&lt;/li&gt;
            &lt;li id="44"&gt;Large Employer Fines&lt;/li&gt;
          &lt;/ul&gt;
        &lt;/li&gt;
      &lt;/ul&gt;
    &lt;/li&gt;
    &lt;li id="3"&gt;Is What I Hear True?
      &lt;ul class="second"&gt;
        &lt;li id="59"&gt;Why should I care about healthcare reform?&lt;/li&gt;
        &lt;li id="40"&gt;Will the government have a say in my end-of-life decisions?&lt;/li&gt;
        &lt;li id="41"&gt;Will Medicare services be cut to control costs?&lt;/li&gt;
        &lt;li id="43"&gt;Will public funds be used to pay for abortions?&lt;/li&gt;
      &lt;/ul&gt;
    &lt;/li&gt;
    &lt;li id="5"&gt;Resources
      &lt;ul class="second"&gt;
        &lt;li id="33"&gt;External Resources&lt;/li&gt;
      &lt;/ul&gt;
    &lt;/li&gt;
  &lt;/ul&gt;
  </code></pre>