hi, i run 10.5.8 and i bought that mac before 2 months. all period before i update to version 10.5.3 or.4 if i am right it was shutting down properly, the mac cannot shutdown never!All that period i push the button. When i click to shutdown all the icons go away and finder menu bar but not the dock and wallpaper. after half min it says that some app couldnt shutdown and i force to quit i load finder again so i will click shutdown but no success at all!!! i am really pissed of with this thing. anyone could help?? really thanks!