I'm having trouble with a delay when typing on my C2D late 2006 MacBook. When I type the letters begin to lag behind and when I press and hold delete, it is very slow (delete's about two characters per second). I've set the repeat rate to high and the delay to short in the keyboard preferences but this hasn't helped. This problem occurs using both the built in keyboard and my Bluetooth keyboard so I think it's a software problem. I'm running 10.5.2 and installed the recent keyboard firmware update, which I think caused the problem in the first place. Any help would be great. Thanks.