[cybmole]

so where do you think the old data is still held - in metadata.db, or in a file in the book title subdirectory.

I can't see the old data anywhere in the book.epub, and the issue persists after converting that epub to mobi so I doubt that it is in the .opf file in the book folder either. The epub file name reflects the changed title.
but if I view the .mobi conversion output with same viewer - I see the NEW title., view the epub again, see OLD title

can you reproduce , & then debug this better that i can.

I just know that if I report it as a bug, Kovid will come back with a reason as to why it isn't - happens every time :-(

ps. nug now reads bug - tick, thanks. caliubre is yet another title typo.

PPS I looked in my backup library. OLD was the file name, before I edited the book metadata i.e. in my backup the book file is OLD.epub. in my current library it is now NEW.epub, but shows as OLD in viewer.