This is not going to be much help, but I have had essentially the same thing happen although I was never able to see any part of the picture. I take the picture, look at the LCD, it is black. I look at the top LCD, and it say ERR. I switch it off and on and it still says ERR. I push the shutter again and hear a click, no picture is taken but the top LCD returns to normal.
The only thing that I "think" I have observed, is that it has only occured when shooting with a DX lens or once shooting with a Tamron FX lens.