Just got my TrackIR3 pro last night, fired it up for a quick play and found that I was getting increasing video corruption each time I launched a new mission (basically triangles and artifacting on clouds, landscapes etc). I've got a ATI 9700 pro and happily run on perfect. Cat 4.12 drivers). Mucked about with custom and default card settings - no impact (better or worse) but then tried changing to Direct x on a whim - no problems at all.
Unfortunately at work so can't post any diagnostics but at this stage just interested as to whether this is a known issue or not?