I have 2 Nikon D7000 bodies and one is only a few months old, but last week, it stopped taking photos and only displays a "ERR" error message when I press the shutter. It looks dim when I look in the viewfinder and won't capture any images. I hear the mirror flipping, but that's it. I've sent this camera back to Nikon to get fixed, but in the meantime need to shoot with one camera only. (I am a family photographer.) Has anyone gotten this ERR message with their D7000? When I google this problem, it sounds widespread, which worries me. I am wondering if I should sell my D7000s and get something else if this is some kind of defect. Would love your input, especially of you own a D7000!