There have been some innate problems with the Single 1.8Ghz G5 (2004 model). Apple recently released a firmware update designed to fix these problems. My brother has this machine. He ran the firmware update, and the problems so far seem to have gone away, but the installer left him with an app called "Lurk-n-Launch." When opened, it doesn't appear to do anything. This is located at Macintosh HD/AppleInternal/PackageDataTools/Lurk-n-Launch. Anyone know anything about this? It seems awfully suspicious. I zipped the folder and deleted the original, because I didn't want it launching itself after lurking on his system for a while.