>I read your reply to Nadya N. on another thread, and I'd like to suggest simplifying the buttons in the left frame even more - put the "Today, Yesterday" etc. buttons on the calendar. I use the calendar for this purpose anyway.

One the primary focus for those buttons was targeted on recent users. Those are the ones that had several difficuties to retrieve recent messages. Then, as for me, I found a regular use to it as well as some feedback I received from other regular users. Of course, it could go in Calendar but I'd prefer to stay it there. However, as I said, it's not a question of real estate as more options will be added in there.