It does not happen on the main page: http://fpcpackaging.com/new/
I've gone through and systematically deactivated each plugin to see if one of those were causing it. When I deactivate Jetpack, the pages with Jetpack's Tiled Gallery no longer have scrollbars. When I deactivate CP Google Maps, the pages with the Google Maps no longer have scrollbars.
I have no idea where to start looking for this conflict. Anyone have any ideas?