Does anybody else suffer from this annoyance at all? It's fine for 99% of the time but occasionally will just glitch to a different point of view.

The TIR software shows good tracking of my track clip as far as I can see and I'm not moving out of the camera's field of view either.

Adjust the light filtering in the TIR software to remove daylight or other light source disturbances.

I have no other light sources to cause interference.

Doesn't need to be light per say, as it could be heat. Like the back of a tv, or some other electronic device. I've had my tv do it. A heater vent, and I even had a candle behind me that was throwing it off once.

Sometimes just moving to another USB port can resolve a glitchy problem - especially if there are USB hubs involved.

I had the same problem in my new apartment. Turned out to be the daylight shining on the white wall behind me. It doesn't need to be direct light causing the problem.
Adjusting the filter should fix it.

Yep, or a lit cigarette.

No lights, no heat sources, no cigarettes, I'll try a different USB port but it's direct and not via a hub.

Does it do the same for all TIR profiles?

want to try the one I use ?, it's Charvels, might be a bit sensitive for but you can tone it down I've uploaded it here:

http://www.mediafire.com/?4ga0s8aiu27gfc2

If it's a direct USB plug in then it's not likely going to solve the problem, unfortunately. I use Charvel's profile because it gives good sweeping visibility in both the vertical and horizontal with very little head deflection required. As Shado mentioned, it is quite sensitive as a result, so I have two joystick buttons programmed to recenter and turn off TIR for moments when I'm actually lining up a shot. Can just as quickly reactivate TIR to regain situational awareness because usually there's a 109 behind lining ME up for a shot! LOL

Let us know if you solve your TIR glitch.

I have been having problems with mine, use exactly the same profile in DCS A10 with no issue ??

Do you wear glasses? If so then you might get some reflections back to the device causing this issue.
I had that issue my self.
There is a light filtering slider where you can drop distubing light sources. currently I'm not at home so I cannot give more details.

What I find interesting is that I can instantly switch between the games with the same profile and one works, one doesn't (properly anyways) which suggests to me at least COD has a problem and not my settings ???