Mine went in for it's 12.5k service last Friday, and the system has been updated to version 513.
I've not noticed any change apart from scrolling down favourite radio stations, before I always needed to use the commander and then select, whereas now I can use the FF buttons on the steering wheel.
Unfortunately yesterday I was driving near work on well established roads but the GPS wasn't reacting to the road changes for 10 mins, then the system rebooted. Not a problem at the time but was glad I wasn't driving abroad on unfamiliar roads. Not sure if this was related but suspect it was.