Why does not update-grub detect Fedora 13 installation?

["H.S." <hs.samix@gmail.com>]

On a newly installed Debian Testing system, I installed Fedora 13 in a
partition but chose not to install the boot loaded since I wanted to use
Debian's boot loader for all OSes.

Now when I do update-grub in Debian, it detects all OSes installed in
the hard drives connected to the system, but does not detect Fedora 13.
I had to manually add the stanza lines for F13 to get its option in the
grub boot list.

I am using LVM. F13 is installed with / mounted on /dev/mapper/vg1-lv8
and its boot on /dev/sdc5. Update-grub appears to miss detecting the
kernels in /dev/sdc5 altogether. Any idea why is that?

Thanks.

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