After reading this long post and trying every CSS change, the one change that actually worked for me was to add to the div tag surrounding the menu

position: relative;

All the other z-indexes must have not meant anything until that was there.

sschleiffer,
My issue was solved in skin.css by adding that position:relative; to my menu div tag.

The best I can explain it is:


in skin.css
.menu_bg {
...
position:relative;
z-index:905;
}

Understand this is in addition to changing the z-index of several other tags (I don't remember which off the top of my head).

Hope that helps.

Eric