Only Header information

I'm not sure what is actually going on so I'm not sure where to post this. I'm running WP 2.9.2 and BP 1.2.3 with BP Social theme. For some reason, I'm having trouble accessing any pages in Wordpress. I'm only getting header information and the title of the page. Buddypress seems to be working fine. I can access my Activity Stream and Groups. I would assume a Plugin conflict, but I've deactivated all of the plugins and still nothing has changed. Any thoughts what I should do? Is it possible that I've corrupted a file that I need to delete or rewrite? Many thanks for any thoughts about how to troubleshoot this.