I just got this message:
calibre, version 2.76.0
ERROR: Download failed: Failed to download metadata or covers for any of the 5 books.
Persona: Double Wild Card (Failed metadata) (Failed cover)
Wizard on the Courts (Failed metadata) (Failed cover)
Banished Destiny (Failed metadata) (Failed cover)
Empire's Son (Failed metadata) (Failed cover)
The Beast Within (Failed metadata) (Failed cover)
Using 2.7.2
From the personal.ini
[
www.fanfiction.net]
## April 2015, ffnet changed their story and user pictures urls to be
## the same. Now the only way to know if the story image is really
## the author image is to go get the author image and check.
skip_author_cover:false