It does it with all keys, including the backspace, which is rather annoying if I've just typed a long paragraph, and then the backspace starts deleting everything. The only way to stop the auto repeat is to hit another key or keys, but by this time the event buffer is usually full of whatever key was auto repeating, and you still have to wait for it to empty out.
Since it's on my MacBook Pro, I can't easily change the built-in keyboard. Also it happens rather sporadically. It can go for a month or more without any problems, and then suddenly it happens.
