Ubuntu Installation :: Cannot Enter LUKS Password In 10.04 Boot

I've just upgraded from 9.10 on a system that has an encrypted root partition encrypted using the following guide:

[URL]

On boot, prior to the LUKS password prompt, I see the error:

Code:
cannot open file /etc/console-setup/boottime.kmap.gz

The consequence is that the keyboard does not respond, the password cannot be entered, and the root partition cannot be unlocked.

This behavior occurs on all 2.6.32.x kernels but falling back to my previous kernel, 2.6.31.9-rt works just fine.

This is on a production system and is not running in a virtual machine, so the issue is not:

[URL]

I have tried running sudo dpkg-reconfigure console-setup, which does regenerate the initram-fs for the desire kernel, but it does not solve the problem.

The guide's initram hook includes the lines:

Code:
mkdir -p ${DESTDIR}/etc/console-setup
cp /etc/console-setup/boottime.kmap.gz ${DESTDIR}/etc/console

... but my understanding of the initram stages of the boot process are hazy and I am unclear what the intent is behind the lines.