I had the same problem yesterday on intrepid. I have a very simple installation of Kubuntu and Windows 2000. After using grub-reboot and booting into windows savedefault fails with grub error 18. removing savedefault command allows the machine to boot into ubuntu again.
-- Regression: grub - Error 18 when using savedefault (feisty/edgy) https://bugs.launchpad.net/bugs/79578 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs