RadComboBox CSS and IE6 problems

Question

Hi

This page has 2 RadComboBoxes on it, which are connected in a subcategory way.. with LINQ datasources.

I'm getting a strange rendering bug in IE6, whereby it is the RadComboBoxes (which I've got on other pages as well, with the same issue) which seem to affect the IE6 specific CSS (shown below) and cause it problems. Basically the menu images appear white and can't be clicked on the live site.

Anything obvious that RadComboBox would be affecting below?

IE6 specific CSS:

.page   
{
    background: none;
    width: 970px;
    margin: 0px auto;
}

#nav li 
{
    width: 80px;
}

#nav li a div
{
    right: 16px !important;
    left: auto !important;
}

#bd 
{
    width: 968px;
}

#ft 
{
    position: relative;
    text-align: center;
}

.footer-logo    
{
    position: absolute;
    top: 4px;
    left: 9px;
}

.ccc-logo   
{
    position: absolute;
    top: 10px;
    right: 17px;
}

#bottom 
{
    display: none;
}


.form   {
    font-size: 83%;
}

.form input {
    height: 21px !important;
}

.form .field.checkField .value input    {
    width: auto;
}