3rd footer column not lining up with the first 2

I just realized today that my footer columns are no longer lined up correctly. In "bottom-content" there are three columns that are to line up next to one another. Instead, one of the columns (the 3rd) falls in a row below the first two. Images (if you can access them):
http://screencast.com/t/D8aJk3TjicYX
http://screencast.com/t/QQxkQ10HP5

The only thing that has been changed since I last saw this correctly has been 1) homepage content, posts and page information. The template has not been changed.

Any idea how to fix this?