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Author Message   Thol Tinkerer Username: Thol Post Number: 10 Registered: 08-2006 Rating: N/A Votes: 0 Posted on Friday, March 16, 2012 - 08:58 pm:    I've read that positional changes that are coincidental with shutter release problems can be a sign that the shutter (the iris blades in this case) are freezing. This is merely 2nd hand news, but it made sense to me when I saw it.