Noticed my script is no longer able to update the CalibreDB with amazon's ratings for my books. I made the change to use the new opf metadata syntax but for some reason the metadata isn't being updated (0.4.133). Does the set_metadata feature of calibredb.exe still work?
"show_metadata --as-opf" still works to get the info. I modify this output with the rating and then feed it back via the set_metadata feature but it doesn't take.