MRRSOFTWARE  Syrinx has the ability to send and receive direct messages. Version 1.3.1 does not show you direct messages you have sent, though it will tell you if the sending of a message failed. Version 2.0 will also show sent direct messages in your timeline.  
(Version 1.3.1)

MRRSOFTWARE  Syrinx doesn't have a way to automatically or manually log you out. You can only log out when you log in with another account (i.e. - you can only be logged in with one account at a time). If you feel you've discovered a bug or are having usability issues feel free to contact me through my website if I can be of assistance.  
(Version 1.3.1)

MRRSOFTWARE  I decided to go Leopard only in the interest of bettering the usefulness of my software. Without Leopard there is no Image Browser, and that was what I felt was the key feature to this release. Please note all previous releases are still listed on my website, those without Leopard are welcome to keep using version 1.3.  
(Version 2.0)