Twice in the last two days I've had my MacBook Pro reboot when I close the cover and put it away. The trick I've discovered, and share for all to follow is to put the laptop down before closing the cover. That way the disk won't get jarred when the MacBook is going to sleep. Apparently if there's a problem in sleeping it just restarts. Not 100 percent sure this will always cure the problem but it did work twice for me. Interested in knowing if the theory is correct.
Last update: Thursday, June 3, 2010; 4:01:44 PM
~About the Author~
Dave Winer, 55, is a visiting scholar at NYU's Arthur L. Carter Journalism Institute. He pioneered the development of weblogs, syndication (RSS), podcasting, outlining, and web content management software; former contributing editor at Wired Magazine, research fellow at Harvard Law School, entrepreneur, and investor in web media companies. A native New Yorker, he received a Master's in Computer Science from the University of Wisconsin, a Bachelor's in Mathematics from Tulane University and currently lives in New York City.
"RSS was born in 1997 out of the confluence of Dave Winer's 'Really Simple Syndication' technology, used to push out blog updates, and Netscape's 'Rich Site Summary', which allowed users to create custom Netscape home pages with regularly updated data flows." - Tim O'Reilly.
Twice in the last two days I've had my MacBook Pro reboot when I close the cover and put it away. The trick I've discovered, and share for all to follow is to put the laptop down before closing the cover. That way the disk won't get jarred when the MacBook is going to sleep. Apparently if there's a problem in sleeping it just restarts. Not 100 percent sure this will always cure the problem but it did work twice for me. Interested in knowing if the theory is correct. 
scriptingnews1mail at gmail dot com.