The destruction of the Human race is at hand, Valve has changed Counter-Strike: Source and the complainers and whiners will come out of the woodwork professing the end of Counter-Strike: Source as we know it (I'm not kidding). Needless to say, this is a pretty significant update to CSS we are talking about here. The radar which up until now has been sadly useless, has gotten a much needed upgrade. Also de_train has gotten an HDR pass, along with assorted bug fixes and SourceTV enhancements.
They also fixed several exploits.
Link: Steam News