Interesting. I have one kid who has dark hair and freckles (like me) and one who is blond and very fair. The blond/fair one has such light sensitivity that his teachers have commented on it. He has a hard time at recess because it takes so long for his eyes to adjust coming outside. He also has autism, and we always thought that was why.
Interesting discussion, though. I have been noticing more and more that people with a PWS on one side say they have other problems on that side as well.