I was already running the Facebook SDK to generate "Like" buttons. Upon activation of your plug-in I saw this: http://i27.tinypic.com/5mlgxt.jpg
When I deactivate the error disappears. I see the new version of the plug-in already offers auto-insertion of the "Like" button, but I would like to see an option to enable or disable that feature.
Otherwise, thank you for the plug-in! The connect feature works great.