On behalf of the Dresden Files fans, I officially noticed this a lot.
Perhaps because it is a lot more noticable in calibre, which does not automagically know to use the Kindle's thumbnails data (or other vendor solution)
but gets the cover -- gasp -- from the
book file! So you have to download metadata and fix it yourself or the bookshelf display when you send to device will be horrible. Not the biggest deal to download and fix (
calibre) but that was the publishers' job dammit.
On the rare opportunities that I have touched ADE with my ten-foot-pole, books without covers alway display that stupid penguin/other publisher garbage on the bookshelf. How any people are not calibre initiates but use ADE, again? And the bother of doing this for a time-limited library book is indescribable... I hate ADE.
I guess since only 1 in 100 ebook readers do anything more complicated than click the buy button from within a reader app/device, you are right, hitch. But past there it breaks down. And apparently ADE desn't have any cover workaround, which should work marvelously when sideloading books the
official way through ADE -- though I assume Kobo/B&N/Sony do and of course the Apple design team would have a heart attack if the
look of a book was messed up.