Facebook: Chrome, FireFox, IE does nothing.
Twitter: Conflicts with Captcha. Won't post to Comments or Twitter page if Captcha is activated. Obviously this is a flaw as Captcha is needed WordPress commenting.
Google: Works great.
As you can see, it's running on 2011 and doesn't work, so it's obviously not the theme. Additionally all but 5% of the plugins used on this are wpmudev plugins.