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The ones I have are good.
I also received an email once that one of the books I had bought was sub-quality, so Amazon requested me to confirm whether or not I wanted the upgrade. This I had to take "own" action by answering the email with "yes" and then turn on Wi-Fi on the Kindle. This procedure was necessary as all notes and bookmarks would disappear when the book was upgraded. (Essensially the old book removed and a new book pushloaded to the Kindle).
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