Sidebar and Footer Not Formatting Correctly

It seems like part of my stylesheet is being recognized and the other part as not. The site is correctly formatted until it hits the sidebar and footer portion of the stylesheet. The styles aren’t recognized and it just lists the raw form of the html.

I’ve had to take off the sidebar and footer from my site, but if you put in random text and go to a 404 error page, you can see the problem:

http://www.baseball-intellect.com/sdf

I looked at the code through firebug and none of the styles show up when I click on anything related to the sidebar and footer despite the fact they are still present in the stylesheet.

This happened pretty randomly and out of the blue, so if anybody could help me out, it would be greatly appreciated.