My iBook has stopped making that little "blip" noise when I change the volume via the keyboard. It still makes it when I change the volume through System Prefs or the menu bar, but seeing as I mainly use the keyboard shortcuts (F3-5) its annoying. Nothing I can't live without, but its helpful to know the volume level when putting on headphones as not to deafen oneself. I tried trashing the system pref. file (I couldn't find anything that seemed to be specific to sound) Oh, and just as an added note, my internal mic seems to have stopped working.. but thats most likely a hardware problem, no?