Please be sure to also go to the Motorola Support Forums and report this there.  A large thread is located on that forum for random reboots as well.  Here is the link to that forum:

https://supportforums.motorola.com/thread/33153?tstart=0      

Also, per the advice of the Motorola tech on that forum, you should remove any task killers - the android OS doesn't need it.  There are apps that are shown in the background, but they are only "ready to run" when needed.  If the OS needs extra memory, these apps close automatically.  VZW store employees need to stop telling customers to install these apps (Task Killers).