Have you started update-manager using sudo before? Take a look at the permissions of the above file. Does it belong to root?
** Changed in: update-manager (Ubuntu) Status: Unconfirmed => Needs Info -- [Feisty] meta-release problem https://launchpad.net/bugs/80713 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs