Comment 4 for bug 368062

Jean-Philippe (from bug 368456), can you update your system?

See which version of duplicity you have installed (dpkg -s duplicity | grep Version). If you have jaunty1, you will hit this bug. But it should be fixed in jaunty2.

Although, you mentioned that you're using deja-dup 9.1, so you seem to have updated very recently...