Kovid, you have attached inside the ZIP the original ePub and the generated mobi, that has been generated as "both" in the "MOBI file type" option in "MOBI output".
I absolutely ignore all about mobi (new or old) format internals, and I'm based in jhowell comment.
The fact is that a book converted from ePub with "margin-top" set to any value higher than 20% for first paragraph in chapter, and "both" as "MOBI file type" end with a MOBI that is wrong rendered in iOS Kinde application.
Kovid, you have attached inside the ZIP the original ePub and the generated mobi, that has been generated as "both" in the "MOBI file type" option in "MOBI output".
I absolutely ignore all about mobi (new or old) format internals, and I'm based in jhowell comment.
The fact is that a book converted from ePub with "margin-top" set to any value higher than 20% for first paragraph in chapter, and "both" as "MOBI file type" end with a MOBI that is wrong rendered in iOS Kinde application.