Hello- I have a 3 year old Powerbook G4. I just recently replaced the battery (with an Apple one). Starting last week I keep getting the "the system clock is set before March 21, 2001" message every time I start the computer up. I am also having a problem where...when I close my computer (still on) it'll shut down completely (after a bit of time). If the computer is open and the battery runs out, it'll also shut down. What's going on? Is this all related to the PRAM?