Hi, after I upgraded my 5D mkiii to 1.2.1 my camera does not recognise my batteries which are original canon batteries. I even bought new ones just to be sure. I am certain it happened straight after the update and can find no cure at the moment except canon asking me to return the camera to them for repair. I know the update is supposed to do this for 3rd party batteries but not original canon batteries.. Has anyone come across this ? Cheers....