What is going on here Phil, is that W&N in the past were sending improperly sized feature banners that weren't full width (6.5in), so, legacy, I think what was happening that someone passed in a color of the right side of the banner and turned the background that color behind the SVG to make it look like a full width header.  I stopped this and made WN submit the proper size imagery.  All of the books can be refactored to this specification and we can get proper width headers for legacy books from WN going forward