I've been having difficulties with ePub downloaded books, both from Project Gutenberg and MobileRead's library, when I try to transfer them to iTunes. They keep complaining about errors having to do with "isoformat" or lack thereof.
How do I fix that?
ETA: I think I may have a solution, but I really don't understand why it (seems to) work. I ran the offending ePub books through Calibre conversion, going into ePub format. I thought the software would either flatly refuse to do it or I'd get a dialogue box asking if I'm out of my mind.
Calibre was kind enough to just do the conversion, and the books successfully transferred to iTunes.