Z-Index troubles for IE. From what I got from the link below… don’t use position:relative as much as possible. Once you use position:relative, it puts the element and all it’s children onto another stack and z-index will not work.
As far as I know this applies to IE 7 and earlier. IE 8 seems to work similar to Firefox. Can’t wait til the day IE 7 is dead.
searched: ie z-index not working
source: http://www.webmasterworld.com/css/3716455.htm