FleurDuMal said:random shut downs - No. I've had one "You must shut down your Mac" message - but that was after I had clicked "Force Shutdown" for iTunes when it was trying (and failing) to rip a scratched CD (iTunes deals with scratched CDs terribly...instead of just giving up and telling you its scratched, it'll just go on and on and on...)
Kernel Panic... In effect, is just as bad as a random shut down.