Aha! All 6 of the books that fail have a com.apple.ibooks.display-options.xml file, whereas the 4 books that succeed do not.
Prior to restructuring, the filepath is META-INF/com.apple.ibooks.display-options.xml
(0.9.18 also uses the same filepath: META-INF/com.apple.ibooks.display-options.xml)
However, in 0.9.991, Restructure Epub to Sigil Norm uses the filepath: OEBPS/Misc/com.apple.ibooks.display-options.xml
The latter appears to make the plugin unhappy.
The pertinent result is:
WARNING(OPF-003): .Users.oda.Documents.Sigil.x-Sigil-09.991.sigil09-991prefs.plugins.EpubCheck.temp.epub(-1,-1): Item 'OEBPS/Misc/com.apple.ibooks.display-options.xml' exists in the EPUB, but is not declared in the OPF manifest.
|