I was running an early drop of FaceTrackNoIR 1.7 for several days with no problem, then all of a sudden no version of Arma 2 would launch for me. Did many many steps and finally saw this thread, removed FaceTrackNopIR and I'm up and running again. Not sure if it is a registry setting or a complaint about one of the additional drivers that Arma tries to load(i.e. the joystick emulator?) If I learn more I will update this thread. I certainly want FaceTrackNoIR to be compatible with Arma. -b
Edit: I tracked it down to the FreeTrackClient.dll, I reckon that If there is an entry in the registry for FreeTrack, then Arma 2 looks in the FreeTrack path for the dll and attempts to load it. After hiding just that dll and leaving FaceTrackNoIR installed, no Arma 2 crash. It did not seem to care about the FreeTrackClient64.dll that was also in that path.