Internet Explorer behaving badly

I have a theme I’m working on that looks fine in Firefox, Chrome and Safari, but is displaying some very strange behavior in Internet Explorer 7 and 8 (I’m not coding for IE 6).

The sidebar and footer are behaving different depending on if you are on the home page or on any other page. The code for including the footer and sidebar is identical on all pages. So is the CSS.

I’ve even tried removing all code within my index.php file other than the wrapper div and the calls to the header and footer, but the footer still displays incorrectly on the home page, but not on other pages.

The basic problem is that I’m dong a wp_list_pages() call to create a menu in the footer. Main pages are displayed horizontally with their child pages displayed vertically under each parent page. This works find on every page, except index.php, which displays them all in one, mostly unstyled, vertical list.

Any ideas on what in the world could be causing this behavior? I’ve scoured my code for missing closing tags and the like, but maybe I’m still missing something. Any help would be greatly appreciated!

Demo Site: http://www.clearconceptsdesign.com/demo/teaser/