I wonder if this is the same hardware issue that the 1D X suffers.
Seeing as how it costs ~$200 to rent the 5D3 for a week, I think Canon should include a $200 check when they return our bodies back to us in a week.
Also, if it's just a firmware issue, can't that be resolved by a simple download and update?
As long as they dont comment on the source of the recall it will be hard to sa if ohardware or firmware.
1DX, 24mm f1.4L II, 50mm f1.2L, 85mm f1.2L II, 135mm f2L, 24-70mm f2.8L II, 70-200mm f2.8L IS II : D800, D4, 24 1.4G, 35 1.4G, 50 1.4G, 85 1.4G, 24-70 2.8, 70-200 2.8 VR II