I should also mention that I still get plugin errors when starting Evolution, but now they refer to spamassassin instead (even though the spamassassin plugin is disabled):
(evolution-2.8:18710): evolution-mail-WARNING **: ignored this junk plugin: not enabled or we have already loaded one (evolution-2.8:18710): e-utils-WARNING **: Plugin 'Spamassassin junk plugin' failed to load hook 'org.gnome.evolution.mail.junk:1.0' -- evolution ships with spam filtering completely mangled https://launchpad.net/bugs/62192 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs