you're are using a lot of div tags. I generally don't use them. But either way, you have this in your code: (I'll cut out all the other stuff so you can just see the div tags.
Code:
<div id="container">
<div><object>top flash file</object></div>
<div id="main">
body that you want white
</div>
</div>
Now then in your css you have:
#container {
width:798px;
margin:0 auto;
background:#fff url('../../images/bottom_bg.jpg') repeat-x bottom left;
}
#main {
width:550px;
margin:5px;
float:left;
In "container" you are failing to completely enter a full 6 digit hex code for white (ffffff) and for "main", you are not entering a color at all.