Yes, all these things could cause mis-interpretation, however, I dont think the ones I am showing are these kind of things, but I could be proved wrong. I will try to post the url now and see if I am seen as spam....
These are the two strange things I have found and dont know how to 'classify' them. It is difficult for me to see how they could be processing artifacts or after-processing grit/dirt/hairs/fingerprints etc so I need some other people's opinions to be my reality check.