David,
It's the Like-Box you're using in the right-hand side bar. It's re-including the Facebook Javascript API file (all.js) and the div tag (fb-root) that Facebook requires on the page. When it's on there twice, it can cause weird issues in many different ways.
Can you disable that and test again? Then, we'd recommend you either replace it with the JFBCFan module, or contact their developer to see if there's an easy way to prevent the re-inclusion of the Facebook Javascript stuff.
Hope that helps, and good luck,
Alex