I am able to reproduce the error with the update-manager in jaunty, 1:0.111.7, and can confirm that the version of update-manager in jaunty-proposed, 1:0.111.9, is able to calculate the upgrade path from intrepid to jaunty, and completed the upgrade. Marking verification-done.
I am able to reproduce the error with the update-manager in jaunty, 1:0.111.7, and can confirm that the version of update-manager in jaunty-proposed, 1:0.111.9, is able to calculate the upgrade path from intrepid to jaunty, and completed the upgrade. Marking verification-done.