Originally Posted by Barty
It does seem to be missing spacing between paragraphs, so things look a bit crowded.
If the book has spacing it will be displayed.
And if there are no values defined which tell FBK what to do default settings will take over. If you set it up properly it will do whatever you want.
For me it looks like this (default settings, not the book itself):
But I agree the unaltered default settings looked very ugly on the Kindle.