Sidebar Won't add any Favorites

Not sure when this first happened, but I noticed it for the first time today.

When I open up my main disc drive I am used to the side bar showing entried for Favorite, Shared, and Devices. Today I noticed that the only thing I am seeing are the shared items and devices. Hmm, thought this was odd, so I opened up the Finder Preferences and selected the sidebar page in the finder preferences. It is here that I noticed all the the items under Favorites are not checked. When I went to check an item, All My Files for example, the check whould immediately uncheck. This happens whenever I try and check any items under Favorites.

Any help would be greatly appreciated.