I have a couple month old MacBook that's great with one odd exception: for no particular reason, the speakers will start popping quietly. They sound sort of like a CD skipping when they do this. It's a low, quiet, but very much audible sound. They do this whether the volume is on or off, and there seems to be no rhyme of reason to it. The strangest part to me is that it seems to be linked to an application. Like, if I have firefox open, and then close firefox, the popping stops. Or sometimes it's another app, like the video chat application. But when I quit that program, it stops making noise. I took it to the genius bar, but they didn't do much to help, just saying it sounds like a software issue and i should try an archive and reinstall of the OS. I did that, and it's the same as it ever was. I've seen other posts about 10.4 having issues with popping speakers, but in those cases it seems linked to itunes or music playing, and not have this weird software component. Anyone know the deal or how to fix it?