Big black rectangle

line 2 general.css

.container_16 .grid_11 {
    display: none;
    width: 640px;
}

You can get rid of it by adding the display none to the above CSS, but then you have other problems because the black box was pushing some other content sections lower on the page. It looks like it is goint to take quite a bit of fooling around in the CSS to get the layout right — there is a lot of really messy code in that page — many empty divs and hard to tell what is going on…