the keyboard repeats (a bit like local
echo). If I press a key, I get two of the same character on the screen. One
appears when the key is pressed, and the other when it is released.
I have seen this happen MANY MANY times with PC keyboards, so maybe my
findings apply. In every instance that I have found it, it is beacuse
someone spilled either soda or coffee into the keyboard, and the pads
were sticking. The key would register when pressed, and then when
released, the pad wouldn't pop up right away, instead it would "peel" up,
and cause a 2nd (or sometimes a 3rd if it was sticky enough) registration.
Opening the keyboard and washing with alcohol or contact cleaner has
always fixed it for me.
-chris
<http://www.mythtech.net>