Description of problem: After F11 DVD upgrade, cannot boot. Just a hang without even a GRUB on screen. Version-Release number of selected component (if applicable): How reproducible: Upgrade from F10 using F11 DVD. Actual results: Can't boot. Expected results: First boot successful. Additional info: /boot is on /dev/md0 (RAID1). Work-around was boot from rescue DVD; chroot; grub-install /dev/md0 . This isn't at all obvious reading the grub-install manual page.
Thanks for the report, this should be fixed in next build of anaconda for rawhide.