The following should fix...
Code:
.main {/*style.css (line 569)*/
background:#FFFFFF none repeat scroll 0;
clear:left;
margin:0;
min-height:600px;
}
.header {style.css (line 413)
background-color:#FFFFFF;
margin-bottom:0;
overflow:auto; /* refer www.quirksmode.org/css/clearing.html */
padding:0 10px 10px;
}