All Platforms
- Support renaming a transfer's files and folders
- Remove the most frequent thread locks in libtransmission (ie, fewer beachballs)
- Show the free disk space available when adding torrent
- Faster reading and parsing of local data files
- Better use of the OS's filesystem cache
- Lengthen the prefetch cache for data sent to peers
- Other small speedups
- Replace the previous JSON parser with jsonsl to resolve DFSG licensing issue
- Fix fails-to-build when compiling with -Werror=format-security
- Improved unit tests in libtransmission
- Tarballs are now released only in .xz format
Mac Client
- Use VDKQueue for watching for torrent files
GTK+ Client
- Simplify the tracker filter pulldown's interface (now matches the Qt client)
- Synced preferences text & shortcuts
- Remove deprecated calls to gdk_threads_enter()
- Silence a handful of console warnings
Qt Client
- More efficient updates when receiving information from the server
- Add an option to play a sound when a torrent finishes downloading
- Add an option to start up iconified into the notification area
- Fix an issue with the tray icon preventing hibernation/logout
- Other CPU speedups
- Open the correct folder when clicking on single-file torrents
- Synced preferences text & shortcuts
- Fix non Latin-1 unit strings
Daemon
- Add support for specifying recently-active torrents in transmission-remote
Web Client
- Extend the cookie lifespan so that settings like sort order don't get lost
Utils
- Support user-defined piece sizes in transmission-create