Comment # 4 on bug 1122569 from Moritz Rakow

(In reply to Michael Chang from comment #3)
> The problem is a crap regexp matching in grub2-once. Would you please test,
> change this line in file /etc/sysconfig/bootloader
>   LOADER_TYPE=grub2
> to
>   LOADER_TYPE="grub2"

This worked. `grub2-once --list` now displays the expected output.