We have exactly the same problem. This appears to be a bug in IE.
We can recreate in IE5 with Win98,Win2k and IE6 on WinXP.
It only happens for us where we have a div on top of a select tag.
We scoured the web for an answer to this and according to MS it is by
design in other words a bug which they have no intention of fixing!
If you do find an answer I would appreciate to hear as well.
> I am building asp pages that all have the same dynamic drop-down menu.
> The problem is, if I have a combo box where the submenu pops up, the
> box stays on top.
> I have tried setting the zIndex on both the combo box and the menu, to
> I put a sample of this problem on my personal Holiday site I am
> gotoDeb.com, just mouseover the menu where the combo box is.
> If you have had this problem before and know how to resolve it, other
> just moving the combo box lower than the menu, your assistance would be
> greatly appreciated.
> Happy Thanksgiving!!