Indeed, it does work fine in il2-fb:aep.
I'm guessing the inability to look straight up in AH2 with TrackIR is a concession to allowing the retention of up/down/side head movement? ... but that's just a wild-ass-guess until HTC weighs in and expands on his statement about "full head movement."
I'm assuming everyone using TrackIR (1,2,3 and 3pro) has the same limitation in AH2?
I'm using the 3.11 driver.
Just for clarification, the regedit fix you mention for fb won't give you a full 'up' view in AH2 ... but it does give you a full six view.
The full 'up' view is more crucial, imho.
Will make a post over at NP just to hurry things along.
Splash1