I was wondering why my Nikon coolscan kept bleeding colors at the edges. Found out from here that its because of a dirty mirror.
http://www.photo.net/bboard/q-and-a-fetch-msg?msg_id=004Kig
Before Cleaning
After Cleaning
http://www.photo.net/bboard/q-and-a-fetch-msg?msg_id=004Kig
Before Cleaning
After Cleaning