Originally Posted by tomsem
There should be an option to turn off publisher font in the aA menu if the embedded font is done correctly (at least KT and K4 have this option). Most embedded fonts will not look great at the smaller text sizes. Not enough screen resolution.
It sounds like you might be rolling your own KF8 with kindlegen or kindle previewer? in which case the file contains mobi, kf8, and source, and will be roughly 3x larger. There is a python script here (mobi forum) that will extract just the KF8. KF8 is not significantly larger than equivalent mobi in general. KF8 files delivered by Amazon only contain the KF8 segment. I haven't played with calibre's conversion to KF8, it may not have this problem.
There is also an issue with KDP when some Word docs are submitted for conversion (unless that has been fixed). Looks okay in previewer and on Fire but on KT text is tiny. "Wool Omnibus Edition" for example. Len Edgerley (Kindle Chronicles podcast) had this happen to a book he submitted.
Nope, original azw w/DRM downladed before the update was 545 KB. Downloaded after the update the file is an azw3 w/DRM and is 2007 KB. Calibre w/tools_v5.3 converts it to a 542 KB mobi and surprisingly
a 1945 KB EPUB.