Macfixit has an article which says the MacBook Pro also has faulty logic boards causing random shutdowns which are being replaced.
http://www.macfixit.com/article.php?story=2006072107423516
Logic board revision -- checking for the new part Apple is replacing logic boards in MacBook Pros for various issues including, but not limited to, processor "whine," excessive heat, sudden shutdowns, and other problems noted in our MacBook Pro special report.