@shalym: Well since all of my books are loaded via USB (sent by Calibre) Amazon is irritating me "only" for all of my books...
And what part of "sideloaded (as in converted, not from Amazon)" is not clear enough? sideloaded = sent via USB. Not all people use Personal Documents Archive aka (Kindle) Cloud or care that it "fixes the problem". I don't like that kind of "fixes", Amazon should've just added "don't show this notification again checkbox" and that would be the end of this annoyance for people who send all their non-Amazon book via USB. While they (Amazon/Lab123) are at it they can also add checkbox for "no I don't wan't to use cloud collection, local/device only collections please"
