Actually, I think the same thing is happening with upgrades from R to S and the message regarding a new version of Ubuntu never appears in update-manager.
** Package changed: ubuntu-release-upgrader (Ubuntu) => update-manager (Ubuntu) ** Changed in: update-manager (Ubuntu) Importance: Undecided => High -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1174242 Title: Update Manager doesn't let me upgrade from 12.04 to 13.10 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/update-manager/+bug/1174242/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs