I have listened to the show since it started, but this is my first post on this forum. If this website I am going to link you to has been talked about before, I am sorry. These things are just way to wierd. The photos were taken on film and digital by multiple people and they all got the same effect. Some of them seem pretty darn obvious what they are. That one looks like a camera strap. But some of the others are kinda cool.
http://www.bltresearch.com/eyewitness6.html#part1
http://www.bltresearch.com/eyewitness6.html#part1