P3Dv2. All that's installed is FTX Global+Vector along with Other FlightBeam and FSDT airports. WOAI.
As discussed many times already, for example here:
http://www.fsdreamteam.com/forum/index.php/topic,10065.msg78976.html#msg78976It's something that is caused by 3rd party meshes, and must be fixed by the mesh, because it must be smoother out around airports, like the default mesh is, because FSX airports can't really be sloped THAT'S why Microsoft pre-processed the default mesh to prevent this. This has been explained so many times here, it's something that must be reported to MESH developers, not airport developers.
The way FSX works, the mesh with the highest nominal resolution will ALWAYS "win" against anything else, regardless of its priority in the Scenery Library so, an addon Mesh that is expected to always show up, should be corrected, otherwise it will create issues at ALL airports that are sloped in real life, but can't in FSX.
Do you see that problem without FTX Global or any other 3rd party mesh installed ? I'm sure you don't.