/boot/upgrade after preupgrade

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http://forums.fedoraforum.org – Hi, I upgraded to Fedora 12 from Fedora 11 using preupgrade. It worked, however there is still an entry in my grub.conf saying "title Upgrade to Fedora 12 (Constantine)" and there is also a folder called /boot/upgrade with the two files initrd.img and vmlinuz in it. Is it normal that all this is still present on my system even after a succesful upgrade? Can I safely remove that folder and the corresponding entry in grub.conf? Is there anything else that the upgrade process did not remove? Thanks, David (HowTos)