Bunches of people are reporting that when making a phone call on their Nexus S the phone will randomly reboot. And random means random- some have it happen every few days while one person tried to make a phone call four times in a row but was interrupted with a reboot.
After a brief silence, enough hand-waving went on to attract Google’s attention to the matter, and they are now claiming they’ve reproduced the problem and have begun working with Samsung on a solution:
If you’re irritated with the issue, at least you know they’re working on fixing the problem. Hang in there Nexus Essers!