You could add edgy-proposed and install update-manager from there. I wonder who you got 0.45.3 without edgy-proposed in your sources.list :)
-- Edgy upgrade to Feisty: No second chance to update with the Update-manager if there is not enough space disk. https://bugs.launchpad.net/bugs/108914 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs