Thu 01-Nov-12 10:20 AM | edited Thu 01-Nov-12 10:23 AM by ericbowles
I wonder if there is a change in the foam used around the shutter or damage to the foam? Take a look under high magnification - a magnifying glass or a macro image with another camera.
We had another post reporting damage to the foam in a recent DSLR - likely from cleaning. But it could be the shutter is brushing against the foam. In any event, foam that deteriorates leaves little dust like particles.