I have a suspicion it could be because of http://www.xpluginsdk.org/saitek.htm OSX 10.6.7 Xplane 9.70 now (just flying first flight with the new version) Procedure: Go to x-plane, load a plane (last try for me was the new Corvalis - gizmo activated), shut xplane. Start xplane again, open the crj, turn master bat on -> Standby Tuning Control Unit is off. Solution: Restart xplane, CRJ loads first -> all fine