I was playing warfare with a friend, both of us were flying mi-24D. I could't see anything out there but my friend told me that he could see even small objects.
So I started to play with graphical options, first on nvidia pannel, then in the in-game graphical menu. Just for trying, I changed 3d resolution from 1440x900 (my screen's native resolution) to 1(whatever)x1080.
From that moment I can fly choppers at night. 3D resolution under "whatever"x1080 means pitch black.
I can record a video if you wish to illustrate the issue (in my case).