Conflict between initialIndex:null and history: true on tabs Created May 12, 2010

I'm trying to set up tabs to be closed then you enter at the same time I'm using the history.
My example keeps all tabs closed if I leave out the "history:true" (tabs expand on click as the should)

Adding history:true makes the the first tab open on pageload (as if I haven't added "initialIndex:null" )

Is this a bug, or is it "this behavior is by design"? (using version 1.2.1 )

Sample code (not working as expexted):

<!-- the tabs -->
<ul class="tabs">
  <li><a id="t6" href="#news">News</a></li>
  <li><a id="t5" href="#about">About us</a></li>
  <li><a id="t4" href="#contact">Contact</a></li>
</ul>

<!-- tab "panes" -->
<div class="panes">
  <div>Newspane text</div>
  <div>About us text</div>
  <div>Contact text</div>
</div>

<script type="text/javascript" src="http://cdn.jquerytools.org/1.2.1/full/jquery.tools.min.js"></script>
<script type="text/javascript">

    $(function () {

        $("ul.tabs").tabs("div.panes > div", {
            initialIndex: null,
            history: true    

        });
    });