About a week ago, the sidebar and footer on my website (http://overeasy.be) disappeared. Rather, the footer is completely gone, but the sidebar is only showing the first of many links - none of the other divs are showing up. I didn't do anything to mess with the code. This problem is occurring on all of my archived posts, not just on the main page. I just upgraded WordPress yesterday in hopes that it would solve the problem, but it didn't help. What's going on?