[JimmXinu]

New Test Version Attached

2024-08-23
- Don't require <dc:identifier> to have attribute opf:scheme="uuid" when using IDPF font encryption.

I still don't know exactly what's going on here--I suspect that there's something weird with the embedded fonts.

I still needed to address the PSCF9-24p086-106Helble.epub bad CRC issue first, but skipping the <dc:identifier opf:scheme="uuid"...> check lets these epubs merge and at least one of the embedded fonts still works--I didn't bother checking more than one.

Calibre's Edit book still marks all the fonts as 'not valid', including the one I can see working.

EpubMerge v2.17 is before EM learned about encrypted fonts, so that makes sense. I've no idea why Calibre 7.6 would make any difference.

Using Sigil to specifically IDPF encrypt embedded fonts in a different epub works fine with Edit book and EpubMerge.