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Message: <blockquote data-quote="BackdoorArts" data-source="post: 137853" data-attributes="member: 9240"><p>Spots recurred after around 750 actuations on the second shutter.  They could have been there earlier, but the subjects I was shooting would have hid them.  The telltale accumulation in the corners with the spots being perfectly round and not scattered specs (like the relatively normal dust photo from my D800) tells me that it's a combination of liquid (oil), dust, and in my case the second time around what looked like a big fleck of something black.  You're absolutely right in saying that if the problem is a build issue and not an overlubrication then they're going to need to fix whatever it is that's causing it and not just replace it with the same thing and hope for something better.</p></blockquote><p></p>