Sorry for getting back to you so late,
No, I am not using DirectX 10 Preview. It seems the ground images are rising up when the night textures kick in. During the day, the wheels of the aircraft are sitting properly on top of the ground, and all the ground textures appear as they should. As soon as night falls, all the ground marking textures dissapear, and the wheels on all the aircraft are slightly buried in a blurry ground texture.
Cheers,
Thad