Bug#494293: ...and finally.
I've started the install-CD in rescue mode, opened a shell in a chroot,
and did an "apt-get purge" to get rid of grub-pc in preparation of
replacing it with the old grub package. Bit then, unlike the previous
time, I checked and saw that /boot/grub was still full of files left
there, including grub.cfg. So, I deleted the whole lot, before doing
"apt-get install grub", "/usr/sbin/update-grub" and
"/usr/sbin/grub-install". Now the reboot brought up the newly-installed
Some final thoughts:
1. The "apt-get purge grub-pc" command should not leave a whole
directory full of config files that are subsequently used by
2. Perhaps old and new grub should not share the same grub-install.
3. The Debian Installer should give users a choice when it wants to
install a piece of crucial software that is still considered by many to
be in beta (in this case new Grub vs. old Grub).
Thank you for your consideration.