Don't know if this is functioning as intended, but I just noticed it. Incoming whispers are recorded in the chat log, but not outgoing ones. At least on my game. Seems an important thing to have, since sometimes as a GM you need to give private info to a player and later you might need to refer back to it in the log. For example, I was trying to determine just how much loot I gave a thief character, who was doing his stealing away from the party. (Especially the paladin.) But I don't have a record of that in the chat log.