The new version will certainly make sure that the missing metadata items are present. It won't, however guarantee that the default values for those items will be correct. You'll still need to edit them.
My point is that it's not really Sigil (let alone a specific version of Sigil) that determines whether or not an EPUB will validate without any errors. That will ultimately be the responsibility of the user. Always. Sigil is not (nor is it intended to be) a complete turn-key solution for EPUB creation/production. Some knowledge of EPUB construction is always going to be a requirement to successfully produce an EPUB with Sigil that passes a particular vendor's submission rules.
Last edited by DiapDealer; 04-26-2019 at 07:25 AM.
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