"The mat collection has a few probs still. Saving a collection to replace a single texture(same name) proves this. You end up with 2identical pngs. Deleting one produces the shrugging guy...."

Yep, I've had that happen as well..... though sometimes I get the "shrugging guy" even one only ONE png is saved (the original created by the Material Collections option). 

Thanks again....

---Pandorian

Pandorian's Website.... aka......