It is definitely not new but from time to time information leaks thorugh the improper use of the "Track Changes" functionality in Word. But it time it is pretty havy - this time we are talking of a summary of the report written by Detelv Mehlis, the German proescutor heading up for the Hariri-case. If you want to see the whole story:

If you want to avoid such kind of leakage, please see the KB about How to minimize Metadata in Office Documents on and check the Remove Hidden Data  tool on;en-us;834427