IE6 bug when form elements on page

1) Script Title: All Levels Navigational Menu (v2.1)

2) Script URL (on DD): http://www.dynamicdrive.com/dynamici...menu/index.htm

3) Describe problem:

In IE6 form elements in the area of the page covered by any of the drop-down menu uls disappear when those menus are visible. Example page up at http://www.beardytaper.com/pjc/ddmenu/demo.htm. This is an exact copy of your demo page with the one alteration to the html of adding a select box on the page. I'm sure this is a browser bug, not a script bug but can IE6 compatibility be improved in this area?

Thanks