Following the tute, I plonked this code into the customize CSS code:

#container {
padding-top: 480px;
background-image: url http://img.photobucket.com/albums/username/blacknwhite.jpg;
background-scroll: no-scroll;
background-repeat: no-repeat;
background-position: top center;
}

(yes photobucket url is disguised) but although the blog itself has moved down to make room for a top-centered background image, the image itself doesn't seem to load. I've tried it with and without brackets and speech marks.

Any ideas what might be causing that?