Check out this video from cnet. Apparently some Palm Pre users are having issues with the Pre crashing when you close the phone. As you can see in the video, after closing the phone the only option is to reboot which takes quite awhile.
Palm has always had hardware issues and it looks like they haven't learned their lesson. They should take a tip from BlackBerry and build solid, reliable phones. Any of you out there remember having to return a Treo or two? We do.