I recently had to get my hard drive swapped out due to the old one blowing but was also having lots of freezing and crashes leading up to this. I've just got my iBook G4 12" 1Ghz back from the Apple Center and now it constantly starts up into the blue screen of death and on the odd occasion the desktop does actually appear the iBook freezes up completely after a couple of minutes. Having looked on google, this seems to be a major proble with the G3's but is it common with G4's, and what can I do about it considering its out of warranty? Is it time for a new Mac?