This appears to have been caused by a PPA version of ubuntuone-couch still being installed.
** Changed in: duplicity (Ubuntu) Status: New => Invalid -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/914186 Title: Deja-dup backup to Ubuntu One fails with DBus signature error from duplicity backends To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/duplicity/+bug/914186/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs