Noticed something interesting the other day. We were watching the DoS EE again and saw that Thrain has two eyes! Not much to notice really, but in the AUJ he had only one eye... He still has the scar across his face, but in the flashback fight scenes and in Dol Guldor he has both his eyes. Mistake? If you look at him in the AUJ Chronicles -Creatures and Characters, he indeed only has one eye.
PJ seems to have a problem with eyes. In the LotR Legolas's eyes are always changing colour, and some people say the same for the Hobbit. People have notice change of eye colour for a lot of characters... PJ never got mixed up with the number of eyes however.
Elladan & Elrohir