New features are:
- Separate toolwindow for incoming/outgoing messages.
- Diff between local and remote version of the file in View User Files dialog.
- Send plain messages (try double-click on user name).
- Send code pointers/selection (right-click in Editor area). Uses diff algorithm for better positioning when local and remote files differ.
- Reply to the last opened message.
The complete changelog is available in this Yahoo groups message. If there won't be any critical issues, I'll release 0.5 on this weekend.