One of the sites I am working on looks great in Firefox and IE, but no matter what I do, the sidebar displays on the bottom only in Chrome and Safari. The sidebar should be displaying on the right, as it shows up in Firefox.
I don’t see a sidebar on the page you linked to, but on other pages you have many mark-up errors which are likely the cause of the sidebar issue. So start by validating the pages and fixing the mark-up errors: