@jackr - The
project user group is arguably a better place for adapter issues, as opposed to plugin specific issues. However, it's not always clear when an issue is plugin specific or not. If you found the problem using the plugin, I'm not likely to complain if you post it here.
This particular problem with fimfiction.net is happening because fimfiction.net is leaving off the 'http:' on story image URLs. IE, '//static.fimfiction.net/images/...' instead of 'http://static.fimfiction.net/images/...'. The browser are apparently prepared to live with this level of broken and fill in the 'http:'.
(
http://www.fimfiction.net/story/6975/ only appears to work because there is a similar image in the first chapter that's being picked up for the cover.)
I've put a kludge in the adapter to deal with this and attached a beta version for you to try. I won't be able to put out an official version until Monday.
You could try reporting it as a problem to the site admins, but since they don't seem to think dates need the year...