Incorrect entries in grub2 menu for another Ubuntu distro

[Pavel]

Linux-boot-prober in Precise outputs the next entries for Ubuntu Quantal on another partition (/dev/sda1):

/dev/sda1:/dev/sda1:Ubuntu' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-simple-bcd70963-01d2-45ec-83ea-2aaf820470be:/boot/vmlinuz-3.5.0-51-generic:/boot/initrd.img-3.5.0-51-generic:root=UUID=bcd70963-01d2-45ec-83ea-2aaf820470be ro quiet
/dev/sda1:/dev/sda1:Ubuntu, с Linux 3.5.0-51-generic' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-3.5.0-51-generic-advanced-bcd70963-01d2-45ec-83ea-2aaf820470be:/boot/vmlinuz-3.5.0-51-generic:/boot/initrd.img-3.5.0-51-generic:root=UUID=bcd70963-01d2-45ec-83ea-2aaf820470be ro quiet
/dev/sda1:/dev/sda1:Ubuntu, с Linux 3.5.0-51-generic (режим восстановления)' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-3.5.0-51-generic-recovery-bcd70963-01d2-45ec-83ea-2aaf820470be:/boot/vmlinuz-3.5.0-51-generic:/boot/initrd.img-3.5.0-51-generic:root=UUID=bcd70963-01d2-45ec-83ea-2aaf820470be ro recovery nomodeset
/dev/sda1:/dev/sda1:Ubuntu, с Linux 3.5.0-49-generic' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-3.5.0-49-generic-advanced-bcd70963-01d2-45ec-83ea-2aaf820470be:/boot/vmlinuz-3.5.0-49-generic:/boot/initrd.img-3.5.0-49-generic:root=UUID=bcd70963-01d2-45ec-83ea-2aaf820470be ro quiet
/dev/sda1:/dev/sda1:Ubuntu, с Linux 3.5.0-49-generic (режим восстановления)' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-3.5.0-49-generic-recovery-bcd70963-01d2-45ec-83ea-2aaf820470be:/boot/vmlinuz-3.5.0-49-generic:/boot/initrd.img-3.5.0-49-generic:root=UUID=bcd70963-01d2-45ec-83ea-2aaf820470be ro recovery nomodeset

As a result I have 5 menuentries with incorrect titles instead of one entry for booting Quantal with the last kernel (3.5.0-51) and instead of a submenu including 4 entries for 2 installed in Quantal versions of the kernel (3.5.0-49 and 3.5.0-51). As I understand, the current version of os-prober in Precise takes entries from my grub.cfg file generated in Quantal and stored on /dev/sda1 (the partition where Quantal is installed) so I attach the grub.cfg entries generated by 10_linux script in Quantal. I have the latest versions of the grub2 packages and os-prober package in Quantal.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: os-prober 1.51ubuntu3
ProcVersionSignature: Ubuntu 3.2.0-67.101-generic 3.2.60
Uname: Linux 3.2.0-67-generic x86_64
ApportVersion: 2.0.1-0ubuntu17.6
Architecture: amd64
Date: Thu Aug 7 00:03:17 2014
MarkForUpload: True
ProcEnviron:
 LANGUAGE=ru_RU
 TERM=xterm
 PATH=(custom, no user)
 LANG=ru_RU.UTF-8
 SHELL=/bin/bash
SourcePackage: os-prober
UpgradeStatus: No upgrade log present (probably fresh install)