website pages won't display

I was working on my site clarksvillerestore.org, I hadn’t been doing anything but playing with the appearance settings (changing colors, width, etc). I went to go check how it looked on the site itself and all my page content is not displaying. When I’m on the back end, all the pages look fine, but when I go to the actual site the menu, header, footer are all there but the page content is not displaying. Please help!

I just upgraded to WP 3.1.3 but the pages were displaying fine after I did that, but then about 30 minutes later they just stopped. This is driving me crazy.