After checking on a real installation (http://forum.ubuntu-fr.org/viewtopic.php?pid=3716589#p3716589) : the 3 following are different : I) MBR before installation II) MBR in /usr/lib/syslinux/mbr.bin III) MBR after installation
Conclusion : /usr/lib/syslinux/mbr.bin is not a backup of the original MBR. So this bug report is still valid.
After checking on a real installation (http:// forum.ubuntu- fr.org/ viewtopic. php?pid= 3716589# p3716589) : syslinux/ mbr.bin
the 3 following are different :
I) MBR before installation
II) MBR in /usr/lib/
III) MBR after installation
Conclusion : /usr/lib/ syslinux/ mbr.bin is not a backup of the original MBR. So this bug report is still valid.