I see those links are built Wordpress using custom menus.
When I view the source code of the page, it looks right:
That confuses the heck out of me. Your pages even validate at W3.org.Code:<li id="menu-item-21" class="menu-item menu-item-type-custom menu-item-21"><a href="http://Jamiesale-cartoonist.com">Home Page</a></li>
I would test by temporarily disabling all plugins and changing back to the default TwentyTen theme.