I figured out that the "UID" in /etc/fstab for both the live and HDD installed versions was 'knoppix.' If you are running the live CD, this UID of course is correct. But most users are not going to create a userid of "knoppix", so it is a bug when it comes to the HDD install.

WORKAROUND: create a userid of "knoppix" for all those times you want to use USB devices.

bug report filed.