Hey Right, I got my macbook in April and as I am an un-proffesional mobile DJ, I use the headphone socket in my mac alot. This then splits up and goes into my amp. Anyway, when I plug it in now, I am not getting stereo, only mono. Is there anything I can do about this? Will Apple replace the socket or what? It's only a few months old and I guess it is still under warranty. Btw, my speakers are playing stereo. Software or hardware fault?