Originally Posted by kovidgoyal
@BR: If metadata is not being written to PDF files when you save to disk, you have either disabled the PDF metadata writer plugin or disabled updating metadata in saved copies via Preferences->Saving to disk
Ah, forgot about that option. So anyone who doesn't want metadata (including custom) exported in the format can just turn that off. So another of my misconceptions bites the dust
. Edit: See post #30.