I've been working on this, and had issues with FF and Safari which have now been resolved. In IE, I have a bunch of different superfish menus which end up being hidden behind other menus.
Here's a link to the demo error http://zifimusic.com/testing/broken-hovers.html and the css page http://zifimusic.com/testing/css/menus.css I have already tried setting z-indexes on the ul .show and .prep, and the elements are relatively positioned, so it is my understanding that the usual IE z-index issues should not be a problem here. I have also tried using the bgiframe plugin, on the following elements .show, .prep, ul, li, .dropped, but this did not fix the issue. Any suggestions would be greatly appreciated. Pete