Currently messages in conversation history window has only date stamps near them. It can be important to also be able to see what time was any message sent or received at. So i think time stamps should be shown there too (as in normal chat window). Also there is no need for date stamps near every message, as conversations are already grouped by dates. Another thing, that continues messages from one user are grouped also. Personally i would prefer to see name near every message. This will save some space in window if you are just sending a bunch of small messages between you and your contact. And there is a bit to big gap between date stamp (should be only time stamp) and a message itself.