I just purchased a iMac G5 20" (and I have already installed Tiger) on Friday and 3 times now have had an issue with simply trying the "Restart" option in the dropdown. Whenever I select "Restart" it clears the desktop of the Dock, Menu Bar, icons and leaves just the wallpaper up but then it just stops at that point and does nothing else, and will just remain like that indefinitely until I force a power off. Any ideas? Thanks.