hi - over the past few days, my 17" iMac core 2 duo has had some kernel panic issues. it has crashed twice while using garageband. when i booted up the computer this morning, i got the kernel panic screen the instant that the GUI loaded. i rebooted, and the same thing happened. rebooting once more solved the problem, but now i'm kind of nervous about the status of my system. should i just reinstall the os? my 90 day applecare is up soon (in a suspiciously ironic twist of fate, i received an email from apple today reminding me about it): should i try to get them to resolve this problem before more bad things happen? (ie, send it away) how serious is this? people always rave about the stability of OS X, but it has crashed more times now in 2 1/2 months than my windows laptop did all last year.