Oh and BTW: I get 8 FPS in certain areas (well,9 is usualy the lowest) but it still looks quite smooth,you only notice the jitteryness when you realy look for it but on higher settings I still get 9 FPS but it's jittery,odd isn't it?
That also used to happen to me ,see, when you are on final and start to see the runway that's when FSX start to build the airport scenery (it was worse when its about and add-on )
In that particular time when you ave to be more accurate with speed ,rudder and yoke maneuver that's when frames drop to 8 or 9 because the game is also building the airport scenery and things turn ugly ..that doesn't seems to be happening now (at least with default airports i haven't try add on airports)