This is the second D800 I've had, the first one was serial #3002xx and the second is #3005xx, both have exhibited the following:
I haven't worked out a pattern to this yet but when in AF-S mode, I'm experiencing two separate issues.
1) At any given time it seems, I cannot move the focus point with the multi selector, it seems to get stuck/freezes. If I press the shutter release or turn the camera off and on again, that seems to allow me to move the focus point again.
2) At random, even though I'm in AF-S mode, the focus point races across the view finder, as if I kept my finger on the multi selector, and all of a sudden it stops, this could go on for several seconds and sometimes it won't stop unless I try to refocus on something else, but even when I do try and refocus, even that don't work at times so I turn the camera off and on again. I've had to point it at may different subjects while half-way pressing the shutter release to stop the focus point from racing across the screen.
At first I thought I just had an issue with that particular camera, but after getting the new one, I'm not sure anymore.
The lenses I've tested thus far are: Nikon 70-200G VR2, and Nikon 24-70G
At first I thought someway somehow I was touching something with my face, nose, fingers etc., but unfortunately not.
Has anyone experienced similar issues?