January 19, 2015 - Steam Client Update Released
Steam Client Update Released

An update has been released for the Steam Client and will be automatically downloaded.

General
Added Steam Broadcasting. See Steam Community :: Steam Broadcasting for more info.
Added in-game FPS counter to Steam Overlay
When Steam has internally scheduled a game update to be queued sometime in the future, the UI will now display a note to the user indicating that time
Fixed a crash preventing 64-bit Steamworks games from launching on older AMD processors
Fixed starting Steam if instance is already running in other local Windows user session
Fixed restoring game specific hardware mouse cursors when exiting the in-game overlay
Fixed errors in web views not localizing properly
Fixed occasional crash when trying to validate your email address
Fixed rendering the Steam Overlay in some D3D8 games.
Updated Windows Compatibility warnings
Improved synchronization and smoothness of video playback
Reduced CPU usage when drawing animated images or videos
Reduced CPU usage when interacting with the main Steam client window

Big Picture
Fixed to ask the user if they'd like to launch immediately or begin updating the game if an update is available but the game has been played recently
When running in 720p mode scale embedded web views so they are readable
Fixed EULA display occasionally failing to display
Revised navigation on profile menu
Fixed crash when entering a screenshot description
Fixed displaying screenshots for games added by shortcut

In-Home Streaming
Fixed severe frame drop in OpenGL games that occasionally occurred on some hardware
Reduced impact on game frame rate in D3D9c games when not using hardware acceleration

Linux
Fixed a rare bug where Steam could delete user files when failing to start

SteamOS
Fixed some combo boxes in steam client settings accepting text input when selection must be made from dropdown

http://www.steampowered.com/platform/update_history/index.php