2 Problem Founded:
The first is in the Theme preview of WordPress 3.5, if you see a preview of the Theme it no works, if you desactivate the plug in works.
The second problem is:
The ShareButton is Blocked by the plug in, if you open this link http://www.peopleinside.it/wp-web/2012/12/19/una-nuova-via-di-lavoro-nellamore-lontana-dai-fiori-di-pietra/ and go on bottom of the page if you push the bottom it can't work.
Can you fix it, if the visitor want share something the plug in block the share button for example facebook