Design snafu

Update: I'm an idiot. I guess when I added the XML link, I forgot to close the <span>. Apparently I know CSS but not HTML. So the footer of this site has decided to move off to the far right when viewed in IE/Windows, for some reason unbeknownst to me. I haven't changed a thing, and it looks fine on my Mac. I've looked at all my files and can't see anything that would cause this (like a giant invisible .gif hidden between lines of text?) and I'm at a loss as to how to fix it. Any CSS gurus have any ideas? I thought I knew CSS but now I'm beginning to wonder.