BuddyPress.org

BuddyPress works in a WordPress install – so in the /community/folder there has to be a WP install you’re posting from. It is not a stand-alone script.

Look at the HTML source of the page, it says:

<meta name="generator" content="WordPress 2.9.2" />

When I go to your main install at the actual root, those menu items on the front of your site are off the root blog.

You have another blog at /community/ as well as BuddyPress. Did you, perchance, install this using SimpleScripts?