Part of sidebar wrong, but only in FF & after a search?

Hi all.

At http://www.bartlett-family.net/chrisbartlett/blog2/ everything is perfectly fine.

However, do a BLOG search, and look at the sidebar below the HTML Writer’s Guild logo. Why does it move about 10 or so pixels to the right on the search page?

This only happens in FF.

How do I fix this without screwing up the rest of the blog pages that are ok?

Thanks!

Chris