Very strange: I select an icon in the finder and it takes a few seconds for the highlight to appear. I need to do more than one doubleclick to open an item and words that I type don't appear on the screen immediately-there's a lag of 2-3 seconds. This condition is not constant, and it clears up instantaneoulsy-in fact, it just did so. Any ideas on what the cause may be. I'm using a 350mhz sawtooth G4 and OS 9.1.