Ah, thanks for the pointer. I found a related bug in the Claws Mail bugtracker and added the link.
** Bug watch added: Claws Mail bugzilla #3763 http://www.thewildbeast.co.uk/claws-mail/bugzilla/show_bug.cgi?id=3763 ** Also affects: claws-mail via http://www.thewildbeast.co.uk/claws-mail/bugzilla/show_bug.cgi?id=3763 Importance: Unknown Status: Unknown -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1724999 Title: Claws Mail 'fancy' plugin missing in 17.10 To manage notifications about this bug go to: https://bugs.launchpad.net/claws-mail/+bug/1724999/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs