Hmmm. I'm not seeing that now. It looks like the last chapter is the non-viewable one now. So it looks like the workaround is working to me.
Originally Posted by FaceDeer
Oh, I found another oddball problem while using FFDL on FiMFiction. http://www.fimfiction.net/story/49084/
gives the error "Invalid IPv6 URL". I've never seen that error before and there don't appear to be any weird URLs in the data the API gives. The story has only one image in it, in the first chapter, and I don't see anything weird about its URL either.
That's caused by a malformed url bbcode in the story desc getting partially converted to to an HTML link and then causing a problem with the calibre 'sanitize_comments_html' routine that FFDL calls.
Now with cover art from [url=http://insanityrainbow.deviantart.com[/url]
You can work around this by using replace_metadata to remove the offending part like this: