Google has created a new line of code that will be displayed in the page code for Adsense. Apparently, no one needs to update their pages with the new line of code (whew), but placed Google ads in the future will include this new line of code.
As usual, Google is keeping mum on the reasoning for the additional code and that only contributes to the conspiracy theories. Ultimately, it is probably something developed to thwart / hamper click-fraud. Maybe they will shed some light on it soon.
