This was fixed upstream in git commit 69915030942771f6813ebc238e86e05b5112f3b5, which was included in GRUB 2.00, so it's already fixed in releases after precise.
This was fixed upstream in git commit 69915030942771f 6813ebc238e86e0 5b5112f3b5, which was included in GRUB 2.00, so it's already fixed in releases after precise.