Grub2 superuser behaviour has changed

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http://forums.fedoraforum.org – I have a problem with grub2 in F17, version is 2.0-0.37. In grub2.1.99-13, you could define a superuser, and this allowed you to boot a grub entry without a password. But it required a password if you tried to edit any of the grub entries. This is perfect for the college where I work. 2.0, however, has changed this behaviour: Defining a superuser means all grub entries require that password regardless. I want to know if there is a way around this behaviour, a way to mimic the previous behaviour, or another option for stopping malicious people (students :) ) from altering the boot opt (HowTos)