This is the same problem I referred to in a new thread called Shooting Blanks. Apparently it is symptomatic of the camera, not just mine. I used flash when it occurred and I was certain the flash fired on those blank shots. On a whim, I hit Auto Tone on those blanks in Lightroom and to my surprise there was indeed an image recorded, albeit way underexposed. It appears that the shutter may be going out of sync with the flash under heavy load. In my experience, as I outline in the above mentioned thread, I only encounter the problem after a fair number of steady-paced captures with flash. Discovering that the camera is actually recording an image in what appear to be blanks casts a whole new light on things.
David, your thoughts?
J Heroun
New York