grub in mbr needs bootable flag

Thu Sep 17 08:20:56 UTC 2009

Im using a kickstart installation with my own partitioning.
I had no problems with Fedora 10 but now on f11 grub will not start without a 
bootable flag set on any partition.

It nearly looks as if grub is installed in some partition but I am quite shure 
that the old MSDOS MBR is overwritten.

Is there a way to check if grub is installed in the MBR?
Or is it a bug in grub?

(kickstart option is: "bootloader --location=mbr")