I'm affected by this bug on 64 bits
(dual boot ubuntu 12.04 / windows seven with efi/gpt)
First i had to modify (with help) grub.cfg
But at every grub update i had to do it again
so, i used boot-repair (with some help) to modify the grub menu
in french : http://forum.ubuntu-fr.org/viewtopic.php?pid=10354211#p10354211
I'm affected by this bug on 64 bits
(dual boot ubuntu 12.04 / windows seven with efi/gpt)
First i had to modify (with help) grub.cfg
But at every grub update i had to do it again
so, i used boot-repair (with some help) to modify the grub menu
in french : http:// forum.ubuntu- fr.org/ viewtopic. php?pid= 10354211# p10354211