Comment 1 for bug 285093

Recently I had the grub error 2 when I wanted to move my system from an old hard-disk to a new one.
It turned out recent mkfs will create the filesystem with inode size 256. This is only supported by grub since hardy (grub 0.97-29ubuntu19).

ubuntu-vm-builder on hardy uses inode size 128 both for a hardy and dapper vm.
vmbuilder on intrepid uses inode size 256 for a hardy vm.
My guess is vmbuilder on intrepid will also use inode size 256, which is not supported by dapper's grub. I guess you need to pass -I 128 to mkfs.ext2 to make it work. Unfortunately I couldn't find the right place to do that, so I could not test this yet.