grubby: unable to open /boot/boot.b

[dahamsta]

7.5.1 upgrade has produced utterly bizarre results.

Installing kernel-2.4.20-31.9.i686.rpm
grubby: unable to open /boot/boot.b: No such file or directory
grubby fatal error: unable to find a suitable template

Machine appears to be running grub:

[root@tightheadlips sbin]# dd if=/dev/hda obs=512 count=1 2>/dev/null|grep GRUB
Binary file (standard input) matches

cat /etc/grub.conf

serial --unit 0 --speed 57600
terminal serial console --timeout=5

default=0
timeout=10

title linux with serial console
root (hd0,0)
kernel /vmlinuz ro root=/dev/hda3 console=tty1 console=ttyS0,57600

title linux
root (hd0,0)
kernel /vmlinuz ro root=/dev/hda3 console=ttyS0,57600 console=tty1

title Red Hat Linux (2.4.20-8)
root (hd0,0)
kernel /vmlinuz-2.4.20-8 ro root=/dev/hda3
initrd /initrd-2.4.20-8.img

uname -a

Linux tightheadlips.xxxxxxxxx.xxx 2.4.25-040218 #1 SMP Wed Feb 18 17:59:29 CET 2004 i686 i686 i386 GNU/Linux

rpm -qa | grep kernel

kernel-source-2.4.20-8
kernel-2.4.20-31.9
kernel-2.4.20-8

Anyone know what the hell has happened here?

adam