I tried using ebook-convert via command line, using this command:
ebook-convert /Users/tev/Desktop/fairy_tail_sample.cbz /Users/tev/Desktop/fairy_tail_sample.mobi --title="Fairy Tail Sample" --authors="Mashima, Hiro" --keep-aspect-ratio --right2left --input-profile=default --output-profile=kindle_dx
It worked...sorta. Now instead of the image being stretched to fit the width and squished to half the height, it's correctly proportional, but only half the height.
I'm guessing this is one of the bugs in the DX profile that was mentioned, which will be fixed in the next release. I'm eagerly awaiting it. =)
