I have a little problem with my 3D cursor within my test environment. If I start the realtime engine, and just move ahead with the camera, the cursor in front of it gets reset, and disappears. :-? I’m not sure where to look for a solution. The cursor ist still there, you just must move the cursor forward only and it comes from behind again.
This doesn’t happen always, moving around a bit without directly going ahead will keep the cursor always in front of you, like expected. To produce the failure, it just is easiest to go directly forward.
The cursor is bound to an empty and I suppose there’s something strange with the local coordinates.
You find my current .blend file here: