"T" key doesn't work when logged in as one user... any ideas?

[carrerascott]

On one of my Imac's (the one my kids use most of the time), the "T" key on the keyboard doesn't work -- when logged in as one user. I created a new user account and the "T" key works fine, so I know it's not the keyboard. Any ideas how to fix this? I've tried going through all of the Universal Access items and resetting to default with no success. I'd rather not have to delete that user account if I don't have to.

It's an iMac6,1 running OS X 10.5.8

Thanks for any ideas as I'm stumped at this point...

 

[carrerascott]

I guess everyone is stumped on this one!