Yes, I exactly passed through this problem a few months ago. I bought a new D70 about 6 months ago, same error comes when the button was pressed and error pops up on the top of screen. The problem was not always but occasionally. I deal with the problem by switching camera off and then I backed on and tried to take first shoot, it seems to noise like “clink” with shutter mirror working but not able to take photo. After the first shot it seems to working well until the error massage comes. Before a month I visited to Nikon repair center under warranty. The problem was fixed here and reported that your shutter was faulty and which is fixed after replacing new shutter unit. I advise you to take your camera in for checkup. If any of the data corruption situation happened in hurry like accidental deletion, formatting memory card then Photo Recovery for Mac can help you. Photo Recovery for Mac is powerful software to recover corrupted, deleted and formatted pictures from Nikon digital camera.