Everytime my G4 comes out of a few hours in sleep mode I cannot get my wireless network to work. This eventually leads to Internet Connect, Network, System Prefs, and virtually every other app frozen with the technicolor wheel spinning away. The restart or shutdown menu commands do not work, so I have to use the power button to turn it off. I have verified and repaired the permissions several times, and nothing serious is noted. This only seems to occur while on battery power. Reminds me way too much of my Dell.