I've been using my MacBookPro (1.83ghz) for 3 days, and today it began acting funky. It has spontaneously restarted about 10 times today. It restarted itself about 4 times in 10 minutes just now. Twice it has restarted as soon as the previous restart completed, before any programs have been launched, and with no peripherals plugged in. Other times it has spontaneously restarted with only Safari open, and with Illustrator CS open. Any ideas about what might be happening? Anyone had this issue? Could this be related to software? Or the 1 gig RAM module I installed?