Rick, Sorry to hear about your problem. Does this happen with one particular lens? Does this happen when the AF mode is set to manual? Does it happen when using the vertical grip shutter button? I would set the AF mode to manual and the shutter to release and fire off some shots. Use both shutter buttons to see if the problem is isolated to the main button. By shooting in manual focus, it will help determine if the problem is related to the AF system. Keep us updated.
Hope this helps....JL
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