Hi,
This is probably something very simple, but I can’t for the life of me figure it out. I’m compiling an ebook into .mobi format for Kindle but the front cover is not transferring. I seem to keep getting the default template one from Scrivener (the my e-book one) even after I’ve trashed it. In compile settings it’s clearly marked as the image I want in the Cover section.
It seems to work fine when compiling for ibooks as e.pub.
If anyone can help, I’d be very grateful.
Considering that it works fine in ePub, and that your settings are correct in compile, my guess would be that whatever you’re using to test the result is giving you a false view of the .mobi. What are you using to actually proof the result, a Kindle device or Kindle for Mac software? If so those are notorious for caching cover thumbnails and refusing to update them when the book is updated. They are really not designed to be development tools, I’d recommend using Kindle Previewer and Calibre for live testing. You want to use devices and such for testing, don’t get me wrong, but don’t place too much stock in the catalogue listing. 
If I’m wrong and every single tool you own is showing the .mobi incorrectly, I’d double-check the situation by enabling the source files option in the KindleGen compile pane. This will create a folder with everything you need to create a .mobi by hand (you can for instance load the .opf file with Kindle Previewer after having made manual adjustments to the source files). If the cover graphic is incorrect in that folder then we know Scrivener is having troubles and can look into that.
Thanks, Amber.
I was using proofing it on the actual app on my mac. When I tried it on my mobile apps it works fine, so must be the cache on that stops it updating.
Thanks again!