Conflicting Z-Index in IE6

Internet Explorer 6 has an issue with positioned elements that use z-index. Here’s the trouble I just had with this:

I have a topnav consisting of an unordered list with a dropdown menu on one of the list elements. The dropdown is a nested unordered list with position:absolute and a z-index to sit on top of any page content below. Fairly simple so far…

However, in IE6, the menu is obscured by an h5, random images, and paragraphs on various pages. The z-index should make this list float on top of other elements, but it seems to be ineffective.

For some solutions check out last-child.com