os-prober does not detect karmic, but only lucid ?

Binary package hint: os-prober

os prober properly detect lucid, that is installed on one partition, but failed to detect the karmic installation from which I'm starting it...

I wan't to use os-prober, because the 10_linux script from grub is creating entries for all kernel and pointing them to the karmic partition, even lucid...

os-prober is smart and detect automatically that the kernel from lucid has another root partition, but he failed to detect karmic...

ProblemType: Bug
Architecture: amd64
Date: Sat Jan 2 20:18:16 2010
DistroRelease: Ubuntu 9.10
Package: os-prober 1.35
ProcEnviron:
 LANGUAGE=
 LANG=fr_FR.UTF-8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.31-17.54-generic
SourcePackage: os-prober
Uname: Linux 2.6.31-17-generic x86_64
XsessionErrors: (polkit-gnome-authentication-agent-1:1807): GLib-CRITICAL **: g_once_init_leave: assertion `initialization_value != 0' failed