Hi,
i really don't know why u use the position: absolute for a loop T_T, but it's not recommended for any site. I had tested and see that the problem is from ur position: absolute; Becoz you have over 2 div with the position: absolute; top: 0; left:0; so, it's stacked and hide your header.
You can solve ur file easily by add to your structure.css:
Code:
#header-container {
position: absolute;
left: 0px;
top: 0px;
clear:both;
width: 100%;
height: 150px;
}
I test it on IE 6. Anyway, i advise you to use float instead.
hf.
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