Thanks. Since you are getting the same error with the apt package manager, which is used by update-manager, I am going to move this to the 'apt' bugs section and set back to new.
** Package changed: update-manager (Ubuntu) => apt (Ubuntu) ** Changed in: apt (Ubuntu) Status: Incomplete => New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/774111 Title: Fails when trying to upgrade. Says it can't see the natty software channels -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs