[sarasas]

I just upgraded from Calibre 2.75-ish to 2.81 and ran a batch metadata download on items in my database with no previous match and it went horribly wrong.

A lot of entries got matched of with completely unrelated books based on the title name being mentioned in a comment to another book somewhere. Those entries got updated with new titles, authors, tags and comments and were basically replaced with a different book.

I went through them manually to try to restore them and noticed that for some of the book, the right data was available, just not as the first match in the list.

I think matching titles against comments and descriptions of books is a mistake but I cannot find a way to turn it off. I hope this is just a bug that can be easily fixed.