[Guest]

...it's quite tricky to see exactly what it is in your screenshot....?? can you take one a bit closer to it? :?:
a random guess would be that it has something to do with Wolfighters new 3d pilots mod, but thats just a guess.... with that mod, you get the oxygen masks floating in front of the pilot sometimes - maybe this is due to that?
if you are using that mod, i could only suggest disabling it, and see if that makes any difference? 8)