I happened to drop into We Got Served and noticed that there’s a new update for WHS out today. You can read more about it here:
This requires a reboot of both your home server and the client console once the updates have been (automatically) pushed down to each WHS client.
Of course if you’ve configured your server to automatically update then there’s nothing to worry about… or even do. Just go to the Automatic Updates section of the Control Panel and choose a convenient time.