Do all other accounts do that?
(make a new one for a test.)
I'm a bit puzzled. Got a Mac in for repair; the "s" key did not work unless the shift key was depressed. Tried it on from the install disk using Terminal, and all was fine, so the hardware was OK (also tried a generic USB keyboard - same). Tried the normal troubleshooting - no solution.
So updated Leopard to Snow Leopard, hoping that would change things - and it didn't.
So backed up all data, and installed Snow Leopard from scratch. And now the qwerty keys on the keyboard don't work - all the others do. Same on a generic keyboard. What's happening here?