Centering Footers

I’ve recently started customizing a new blog and it seems that the footer on the main page is no longer centered. It is pushed over to the right and half of it seems to be under the right sidebar.

The non-main pages do not have a right sidebar, and the footer is centered perfectly. I have not made any changes to the footer code and can’t seem to figure out where anything on the main page has gone wrong. The code to the sidebar is all there, minus a couple main links… and it didn’t fix the problem when I went back to the original sidebar code.

How can I fix this? Any advice would be greatly appreciated.