IE 7 & 8 overflow:hidden problem

I am working on the CSS of a project. And encounter some Overflow problems with IE. This is the testsite:

http://eparking.bluesys2.ch/fr/parking/search.html?l=Fribourg&d=27.6.2010&t=

You can scroll the list using the buttons under the list. In firefox, safari and all the other normal browsers anything works fine. But in IE i can't make this overflow: hidden; to work and it starts to drive me crazy. The list shows always shows up in its full length, now matter what i try. Can anyone give me a clue?

this is the css of the开发者_运维技巧 list container:

div#listing {
width: 204px; height: 364px; overflow: hidden;
}

and this are the objects inside:

div#listing ul li {
    position: relative;
    padding: 5px;
    margin: 0 0 7px;

    height: 54px;

    background-image: -moz-linear-gradient(top, #f5f5f5, #ddd);
    background-image: -webkit-gradient(linear,left top,left bottom,color-stop(0, #f5f5f5),color-stop(1, #ddd));
    border: 1px solid #ddd;

    -webkit-border-radius: 5px;
    -moz-border-radius: 5px;
    border-radius: 5px;

    -moz-box-shadow: 0 0 8px #ddd;
    -webkit-box-shadow: 0 0 8px #ddd;
    box-shadow: 0 0 8px #ddd;
}

Event if i set the UL that contains the LI's with my list to 100px height with a hidden overflow. They show up.

Well known IE bug. Do this:

div#listing {
position: relative;
width: 204px; height: 364px; overflow: hidden;
}

Edit: Link explaining it here: http://snook.ca/archives/html_and_css/position_relative_overflow_ie/