grub2 menu still show old version after online update

Hi

I have done a live update from opensuse 12.3 to opensuse 13.1, and then to opensuse 13.2, using the instructions from https://en.opensuse.org/SDB:System_upgrade
the problem is that my grub2 menu still lists my OS as opensuse 12.3, and if I run grub2-mkconfig, the entries still come up as

menuentry ‘openSUSE 12.3’ --class opensuse --class gnu-linux --class gnu --class os $menuentry_id_option ETC

a ‘cat /etc/rel’ does show everything as opensuse 13.2 as it should,

From which file does grub2-mkconfig get the information about the openSUSE version?

You are most probably on openSUSE 13.2, the only thing is that the text in the Grub menu has not changed. That is understandable. The way of updating you used only installed new packages for existing packages. It does not change any configurations. Thus YaST > System > Bootloader and you will find there somewhere the text of your entries. Change to version number(s) there and you are done.