So Google released a new version of its Google Analytics tracking code at the end of last year. The new Google Analytics tracker is a complete rewrite of JavaScript inherited from the Urchin acquisition in 2005 and the first time the two products have been officially decoupled. Well the existing ( or better say previous ) version of Google Analytics tracker, urchin.js, has been deprecated but should continue to function until the end of 2008. Google will only roll out new features on the new ga.js tracker. The new tracking code makes advanced features a lot more accessible.
I know many of you who track website statistics using Google Analytics already updated it but the others should upgrade your templates to take its full advantage as the old tracker will be deprecated completedly within a year, and new features are only available to users running the new code.