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shamanNS · 09-28-2022, 05:14 PM

@DenS What was the original format for that book? Aka did you happen to do conversion via Calibre from retail mobi to epub (& then sent that epub file to Kindle via email?)?
Or where both mobi file and epub files results of Calibre conversion?

In other words:

1) what are your Calibre settings for output profile?
2) did you use Calibre to convert that book before sending it to Amazon's servers?

Because Calibre conversion will use output profile that can and will resize all images to match the max size set by particular profile. So maybe that facts is the source of that difference in cover thumbnails quality? (as in lower quality / resolution fullsize cover used to generate lower quality thumbnail?)

@Badcatalex Did you reinstall jailbreak hotfix after installing this firmware update? And do you now have visible "Kindle Feedback" book?

09-28-2022, 05:14 PM	#18
shamanNS Wizard Posts: 1,127 Karma: 12345678 Join Date: Feb 2010 Location: Serbia Device: Kindle PW5, Kobo Libra 2, Kindle PW1	@DenS What was the original format for that book? Aka did you happen to do conversion via Calibre from retail mobi to epub (& then sent that epub file to Kindle via email?)? Or where both mobi file and epub files results of Calibre conversion? In other words: 1) what are your Calibre settings for output profile? 2) did you use Calibre to convert that book before sending it to Amazon's servers? Because Calibre conversion will use output profile that can and will resize all images to match the max size set by particular profile. So maybe that facts is the source of that difference in cover thumbnails quality? (as in lower quality / resolution fullsize cover used to generate lower quality thumbnail?) @Badcatalex Did you reinstall jailbreak hotfix after installing this firmware update? And do you now have visible "Kindle Feedback" book? Last edited by shamanNS; 09-28-2022 at 05:17 PM.