Stacked Menus. Children hiding behind other parents.

I’ve tried this with and without customizations to the CSS of Nice Menus and so I know it just isn’t my customizations of the CSS.

I am trying to create several horizontal menu bands, some without children some with. The problem is that the children seem to hide behind other parents. This happens in every browser except IE6 where it displays the children perfectly. I’ve discovered that you can resolve this issue by setting the CSS display of the ul.nice-menu to static, however that removes compatibility with IE 6. I have the bands below the primary navigation set up as blocks and when editing the site the “edit block on hover” option, somehow forces the children in front of the other parents (which is ideal, and the reason why I didn’t discover this issue until I logged out and tested the site from the anonymous browsers perspective).

The attached image shows the problem without my customizations. Any advice/assistance would be greatly appreciated!