Broken layout in IE6

Had a friend point this out to me. I just put up a new post, and when you view it in IE6, the entire site is fubar. Yet if you look at other posts, they don’t create this mess at all.

There is something specific about this post that has created the problem. Would anyone care to check and see if they can spot anything?

Thanks.
http://blog.nuclearmoose.ca/archives/2005/01/09/the-moose-hunt/

Running WP 1.2.2.