Transmission 1.60 is now available for download.

All Platforms
-Seed ratio limiting
-Transfer prioritization
-Option to specify if transfers are included in the global bandwidth limits
-Random port, with optional randomization on startup
-Improvements to UPnP port forwarding
-Support for file preallocation on XFS filesystems
Mac
-Requires Mac OS X 10.5 Leopard or newer
-Groups (moved to preferences) can be auto-assigned to transfers when adding based on multiple criteria
-Groups can have a default location when adding transfers
-The speed limit scheduler can now be applied to only specific days
-Bonjour support for the web interface
-File filter field in the inspector
-Option to include beta releases when auto-updating (using modified Sparkle 1.5)
-Portuguese localization
Qt
-New beta Qt client!
GTK+
-Speed Limit: Second set of bandwidth limits that can be toggled or scheduled
-Properties dialog now lets you edit/view multiple torrents at once
-Allow sorting of the torrent list by size and by ETA
-Show the file icon in the list
Daemon
-Watch folder for auto-adding torrents
-Many new features in the RPC/JSON interface
-Allow users to specify a specific address when listening for peers
Web Client
-File selection and prioritization
-Add option to verify local data
-Fix "Remove Data" bug

"download-limit": 100,
"download-limit-enabled": 1,
"upload-limit": 35,
"upload-limit-enabled": 1,

"speed-limit-down": 100,
"speed-limit-down-enabled": true,
"speed-limit-up": 35,
"speed-limit-up-enabled": true,