D600 and D7000 shutter scratch - another reason for spots?

tisbonephoto wrote:

Just found another potential reason of the "oil/dust" problems. The coating on the lower part of the shutter courtain gets scratched off as it moves (maybe sweeped is a better word).. I first noticed it in my friend's D7000 with a higher shutter count - it's pretty evident. In my D600 it's only noticable if I look at a right angle. There are shiny(-er), curved stripes on the matte coating.