Don't get me wrong, I heart my Kindle! But I was recently reading Inside of a Dog and saw that the author said she had fed her dog raisins. Since raisins are known to be toxic to dogs, I found this upsetting and actually e-mailed her (a first for me). She answered almost immediately saying that I wasn't the only one to have remarked on this and she was surprised because there was a footnote right there saying that more recently raisins had been found to be dangerous for dogs. I looked again, and the note wasn't there. Turns out that on the Kindle all notes are given at the end of the book, and since you can't flip around the way you do the pages of a book, you don't really see them until you've finished reading the whole thing. Even more problematic, because there are no page numbers, it's almost impossible to go back and find out what each of the notes refers to.
This is not going to cause me to give up my Kindle, but it seems like a technological issue that would be relatively easy to fix--Amazon, are you listening?