Perhaps you've got a Nexus S, and perhaps you've been totally fine with everything it's capable of (and it's capable of a lot!) but you've got one problem - random rebooting. Not ok! So what do you do? You do like WestindiesKING did, and report it to Google! This is exactly what happened back a few days ago on the 29th of December [See Here]
. Now there's a brand new response from Ry_Guy (a Google official) which says that indeed they have been able to reproduce this error, and are working on it.