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FWIW, I take long exposures 30s+ all the time (D800... not E), and I've never encountered this issue.
I just set up and took a quick 60s shot of my bedroom door (haha) and wasn't able to see any problems.
EDIT: I guess i should have read it more thoroughly. His problem was that he didn't shut the viewfinder shutter (that was what I actually suspected initially, haha), and he figured that part out.
I'll test for the white spots later. For little white noise, I don't think the problem is unique to Nikon. Most DSLR's have long exposure noise reduction for this purpose, and you just have to decide whether or not you want to deal with it. The bright hot spots are a concern though, and I'll look for those.