When the iMac G5s first came out, there was an occassional "popping sound" problem. I most often experienced it when iTunes was playing in the background and a system sound was played. Apple fixed it with one of the Panther updates. Well... for me, it is back on my 17" iMac G5 1.8GHz w/SuperDrive. Is anyone else having this problem? FWIW, I did a clean install of Tiger, installed and updated both iLife '05 and Office 2004, and moved data files back. Thanks.