If you Google ga_social_tracking.js, you'll find it described as "A simple script to automatically track Facebook and Twitter buttons using Google Analytics social tracking feature." Everything I've looked at, makes it appear to be a harmless utility.

Notice has been sent to Max, so I'm sure he'll check it out. But I don't see any need for concern.

Here's more information: http://www.lunametrics.com/blog/2012/03/29/tracking-social-google-analytics/

-Joe-