PowerMac not iMac. I am just wondering if there are any of you who have a single processor 1.8Ghz G5 PowerMac running Tiger. Not sure if you know of the freezing problem that occurs after the machine has been running for 2 hours or more. The freezing occurs when viewing a slideshow in iPhoto/Mail, fullscreen visualizer in iTunes, fullscreen Quicktime movie, sites in Safari using the Quicktime plug-in (apple.com/trailers for example). Just wondering if there are any of you with this machine that don't have the freezing issue requiring a hard reset with the power switch. There are many people on Apple Discussions with this problem though.