@Adolfo, that was it! For some reason gnome-settings-daemon was uninstalled on my upgrade to 16.04, and on boot Ubuntu was complaining about an error with it. I installed it, re-logged in and everything is now correct.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1506704 Title: Thin font, nautilus doesn't integrate with Unity. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-settings-daemon/+bug/1506704/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs