During testing my new game with different video boards (GF2, GF3, GF4, GF FX, Radeon) I’ve found odd bug. It appears only on nVidia GF2 and GF3 in full screen mode only (in windowed mode everything looks OK). Some close polygons start Z-fighting with each other. Especially you can notice it with fake shadows (just textured polygons placed close to level surface). It looks completely weird because all ATI cards and GF 4 and GF FX work just fine.
Moreover in windowed mode everything is OK. What is wrong?
What is difference between fullscreen anf windowed modes on GF2 and GF3?