My iTunes has started to crash after a period of time (often when I haven't done anything) and, when it happens, I can't kill it using Force Quit, killall, kill -9 or even sudo kill - I end up with a zombie process which stops the machine from rebooting. The library is stored on a 1TB drive in a Power Mac G4, connected with a SATA card. It streams from there to an Apple TV in the lounge. I've tried repairing permissions and even taking out the RAID setup so that it's now just on a single drive, but no dice. Any ideas / suggestions? Very many thanks in advance for any help!