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eschwartz · 08-15-2016, 01:16 AM

To elaborate: calibre does not have the ability to update the metadata within the AZW3 component of an existing dual-MOBI (type "both"). This is due to the difficulty of robustly modifying the metadata headers in a dual-MOBI.

Kovid hasn't devoted the time to fix this, since it basically only affects people who email to their Kindle and want to receive AZW3 via the PDOC service. Which is a very small percentage of users, and it is simply not worth investing the time it would take to create and test a fix.

So you will probably just have to live with setting the desired title metadata during the initial conversion to dual-MOBI. Or use old MOBI.

08-15-2016, 01:16 AM	#3
eschwartz Ex-Helpdesk Junkie Posts: 19,421 Karma: 85400180 Join Date: Nov 2012 Location: The Beaten Path, USA, Roundworld, This Side of Infinity Device: Kindle Touch fw5.3.7 (Wifi only)	To elaborate: calibre does not have the ability to update the metadata within the AZW3 component of an existing dual-MOBI (type "both"). This is due to the difficulty of robustly modifying the metadata headers in a dual-MOBI. Kovid hasn't devoted the time to fix this, since it basically only affects people who email to their Kindle and want to receive AZW3 via the PDOC service. Which is a very small percentage of users, and it is simply not worth investing the time it would take to create and test a fix. So you will probably just have to live with setting the desired title metadata during the initial conversion to dual-MOBI. Or use old MOBI.