My macbook (not pro, currently running OSX 10.4.11) had been working fine for a while until about a month ago . I was out of town without my computer so I didnt address the problem until now. Neither my volume or brightness control keys work by using the F1-F5 buttons. I had a similar problem once before, but this was fixed by system preferences. When I open system preferences it is fine. However, whenever I click on Security, Displays, Mouse and Keyboard, or Sound, it "quits unexpectedly". All the other options to click on in system preferences work just fine. I think this came about when I tried to reinstall frontrow a while ago. For this I downloaded something called Pacifist and the fontrow update, as this is what I heard I needed to do. However, I have deleted both of these downloads and the problem still continues. Please If anyone could help I would greatly appreciate it.