This is my first Mac, and I love it. I have wanted one since 1998 and finally got one. I have had it for about 2 weeks and everything has been fine until yesterday. The volume in itunes,vlc player,youtube, you name it, doesnt respond to the volume buttons (f10,f11,f12) at all, requiring me to individually control them in each player or application. I have been personalizing my mac and all my preferences since day one, but can't think of anything that I did to separate the function of the volume keys from the volume output. EDIT TO ADD: When i push the volume buttons, the volume image on my screen responds, and indicates that I am moving the volume up, down. or off... but the the actual volume level output that my ears hear stays the same unless manually controled from the audio/video player or application. I rely on these..just went on a coworker myspace to leave her a comment and her song starts blaring out in the coffee shop I am at... and it was a terrible clubby/ghey/house/trance song. I am a newb and there is prob something simple I did to set it up this way, but i can't figure it out. Please help.