Any ideas what I'm missing to cause the footer on this page to reposition incorrectly?

Hi all, I have a probably very simple problem with a footer on my website.

I am not sure what I have done but the footer on this page is not in the middle where it should be whereas on the rest of the site it is fine. Can't seem to figure out what I have done to make this happen but thought I'd post it here to get some ideas back?

http://cascadepictures.co.uk/about-musicvideos.html

cheers in advance.

Jeremy

http://www.cascadepictures.co.uk