It would by really nice to implement feature which can auto magically find your replies to selected message. It often takes me few unnecessary minutes to find replies to messages in my inbox. It should be much more sophisticated than simple icon in mailer view that indicates answered messages. For now, I have to check all sent messages filtering by subject or potential recipients (usually sender but not always!). I think that simple "show replies" in RMB menu of selected mail will be VERY useful.