I've been running fedora rawhide for about a year. For the past 2 weeks or so, when the kernel updates and then installs automatically through 'yum update', the new kernel consistently fails to boot (kernel panic). My root partition is hda1. After the yum update, when I review grub.conf, I find, for example, 'kernel /boot/vmlinuz-2.6.11-1.1315_FC4 ro root=/dev/hda1 /dev/hdb2' rather than '....root=/dev/hda1'. Even if I delete the extra '/dev/hdb2', I still get kernel panic on reboot. The last kernel to successfully install and boot for me was 2.6.11-1.1240_FC4. Thank you.