Messed up my theme and don't know how to fix it

It was working perfectly earlier. I wanted to preview another theme (even though I had this one set to the point where I REALLY liked it), and when I went back to using the Daily Theme, now the website looks all funky and there is no structure.

Please help!

http://www.idahofallsnow.com

Single install, Wordpress 3.2.1 Not using the BuddyPress features.