Comment 3 for bug 442631

Just checking this report and noticed that my email to HankB was cut off.

End of email: "Ubuntu 9.04 (from 40_custom)" and boot from Jaunty on /dev/sda6.

One more thought (if you have enough space on /dev/sda6).

You could boot into Karmic, mount the two Jaunty partitions to, eg, /mnt/sda5 and /mnt/sda6, cp -a the files and directories in /mnt/sda5 to /mnt/sda6/boot, and comment out/remove the entry of /boot in /mnt/sda6/etc/fstab.

When you run update-grub, 30_osprober should create a correct entry for Jaunty; and you will not need the entry in 40_custom (it would not longer work anyway).