Numeric keypad broken under 10.1?


I have an old Apple Extended ADB keyboard hooked up to my B&W G3 400.

I just tried to use my numeric keypad for the first time in eons, and it does not work. I tried this both in Classic and Carbonized applications, with and without the Num Lock engagaed.

Is this a global 10.1 problem or just me and my configuration?
I discovered the same problem yesterday and then remembered that I'd turned on the Mouse Keys option in the Universal Access panel of System Preferences. Turn it off and your numeric keypad should work. It did for me.