I don't know how long this has been going on, as I don't usually scroll all the way to the bottom.
If you look at the homepage you'll see that everything looks okay. Scroll down to the bottom, you'll find the footer. and then you'll find a complete duplicate of what you just looked at.
Am I missing a div somewhere? I've looked, but I'm not very comfortable with php (though I'm learning).
This may or may not be related: an image that showed up in the sideboard with no problem is now showing a broken link. I checked the widget, and the url was correct. I moved the image to another widget, still no luck.
I'm less worried about the image than I am about the doubled pages.