HTML tidy Lists

Hi

Is there a simple way to stop HTML Tidy from rearranging lists
ie

*<ul>
    <li> Item 1 </li>
    <ul>
       <li> Sub Item One </li>
    </ul>
</ul>* 	

    * Item 1
          o Sub Item One


**becomes

*<ul>
    <li> Item 1 </li>
    <li>
        <ul>
           <li> Sub Item One </li>
        </ul>
    </li>
</ul>* 	

    * Item 1
    *

          o Sub Item One


Thanks

Jason Taylor
**