Kindle paperwhite crop background-image on top/bottom
 

Hello,
as describe in the AmazonKindlePublishingGuidelines we developed fixedLayout-ePub with background-images. But for compatibility with other device, such as Sony, its necessary to use also an image in the div. In the css-mediaquery this image is omitted for kindle device.
Now the problem is, that if an img-tag is in the div with the background-image the background image is cropped on top an bottom. It seems that the width is determining. Without image everything is well.
Did anyone know this problem an perhaps a solution?
Thanks for help!

Just a hint: you might receive more help if you ask this question in one of the E-book formats forums.

This forum here is (mostly) about developing software, not publishing books. While it's not impossible that some of the folks here can answer that question, I assume that the real experts are over there in the other forums.