When using a US turret mounted weapon (Humvee M2, M151A2, M2HB and M60 tripod plus the machine gun nests M2HB and M60) it is no longer possible to utilise TrackIR correctly. TrackIR works as normal as infantry, but once in a turret it is no longer possible to look around as before. Pressing the 'freelook' key does allow a look around function, but this disables the guns traverse function, so it can no longer be aimed.
Freelook should never normally be required when using TrackIR.
This was working previously, and has been a problem since one of the newer patches (since Ground Support I believe). This makes it even harder to use turreted weapons effectively.
Just also tested with PKM mounted in a nest, same issue.