When I first got my paperwhite 2 I did the exact same thing. I looked for any flaws that would bother my reading experience. At first, I had a blotch like area like yours and was worried. I decided to wait it out since I had thirty days to decide. After a week I could not find the blotch area. I don't know if it disappeared or if I just "got over it." I really enjoy reading on my pw2. It is my favorite reader now.
Penny
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