Grub finds a distro, but messes up grub.cfg

[Frank McCormick <debianlist@videotron.ca>]

I installed yet another distro yesterday (on sda7), chose not to have it 
install the boot loader, exited after the install and rebooted into 
Debian Sid. From the command line I updated grub.cfg via update-grub. 
Rebooted again and found that Grub had written 3 lines, all the same for 
the new installation (which was absolute linux by the way).

It had no trouble finding the kernel. This is what is in sda7/boot/


boot_message.txt
config
config-huge-smp-3.2.7-smp
inside.bmp
onlyblue.bmp
README.initrd
slack.bmp
System.map
System.map-huge-smp-3.2.7-smp
tuxlogo.bmp
vmlinuz
vmlinuz-huge-smp-3.2.7-smp


Any clues as to why Grub is doing what it's doing ?
--
Cheers
Frank