Facebook Button Not Working

My Facebook button is not working on this site: http://heartattack.attorneys.us/

It is working on other sites within my Multisite network: http://pradaxainjury.attorneys.us and http://cincinnaticaraccident.attorneys.us are working examples.

I've tried disabling the plugin and re-enabling it. Nothing.
I've tried disabling my other social plugin (Social Media Widget). Nothing.
I've tried disabling most of the plugins in the muiltisite network, including Google Maps and other plugins that might have had conflicts. Nothing.
I've tried turning on and off just the Facebook like function. Nothing.

I'm also running the latest version of everything.

Thoughts?