IFD540 Flight Timer

Had a weird one today.  I have the flight timer displayed on the left side of the IFD and I understand that it should start counting when the airspeed goes above 40kts.  It has worked fine until today.  After the flight, on the way back to the hanger, I noticed that the flight timer was still at 0:00.  I flew for at least a half hour and this is the first time that I've seen this behavior.  Anyone else?  I have the 10.1 update.

Yes, the flight timer was working fine after the 10.1 update.

One thing I love about the update is the advisory glidepath. I haven't had time to research it yet but does it only work on non precision GPS approaches and does it work on all non precision GPS approaches?

Simpson, When you say it works on certain approaches what are the conditions that make it not give advisory glideslop on some of these lnav+v approaches.