For reasons I do not understand the On (start) button on my Apple 15" LCD Display stopped working when I upgraded from 10.3.3 to 10.3.4. I now have to use the button on the face of the G4 to start. You don't really miss something like a button until it is gone. I have been starting my system from the button on the edge of the display for a long time and now it no longer works. Anyone else noticed this issue? Dick