I'm making a flight right now in another window using the Citation Longitude.  I hadn't set anything to fail, but immediately after takeoff I got a red warning that my autothrottle had failed.  I'm not complaining, I was just surprosed and wondered if anyone else had experienced such things.

I have never received a red warning sign, but I have seen it disengage sometimes when I have engaged it to late, I usually engage it on the runway when the speedometer starts running, are you in beta? if so, check your failure settings they can be changed without notice during beta installations.