After recent software update, keypad mapping broken

I have a Dell mini-tower that I've been using for Ubuntu for the last six months or so. (I started with Ubuntu 10.4 .) I've been weaning myself off of OpenVMS and into the linux world. As part of that migration, I've been using a nice script called VMSterm that launches the terminal with a bunch of keyboard mapping so the keypad emulates (mostly) a VT100 terminal. That allows me to use VMS tools like mail and tpu like I was used to with a native Alpha computer.

After my most recent software update, however, the keypad mapping has stopped working entirely. In trying to figure this out, I started playing with keyboard utility (System -> Preferences -> Keyboard). Regardless of the layout I try none of them recognize the keypad. I even plugged in a spare Apple USB keyboard and got the same results.

So what changed and how can I get my keypad back??