Well, things couldn't be too easy now, could they?
Had to do a mirror backup system restore due to damaged registry and windows installer. So far, everything's going fine -- except Track IR. For some reason, its seems like the sensor to software transition is very messed up...so that with very minimal yaw (especially to the left) I'm getting a sudden transition to a spastic input position. It's easier to show than to describe, so here's a couple screenshots. (I've reduced the graphic settings so the TrackIR boxes are larger.)
Notice how very little difference in the box with the green dots (the raw input of the infrared camera) makes huge changes in the postion of multiple input axes (the yellow lines in the graph box) which result in bizarre postions of both the perceived head postion ("Your Head") and the accelerated "in game head." I'm pretty sure the problem is coming from BEFORE the profile is applied, because there is an incredible degree of software perceived "real head" movement in the head on the left even before the profile and acceleration curves get applied. Also, I can't show this without a movie but when I make extraordinarily gradual and gentle movements, the TIR reads those movements slowly until a threshold is reached -- and then the positions snap to those shown as fast as a mousetrap closes.
I've tried going with a variety of profiles, even though the one I've always used was working fine. I also run with TrueView turned off, and even went so far as to uninstall the program and then reinstall from scratch. I have no idea what the problem is...and I hadn't touched the camera setup at all during the mirror restore.
Any thoughts?