Features- Added support for Linux- Offline messaging: You can now send messages to users who are offline. They will receive the message when they next log in- Opening a chat dialog with a friend will show some recent chat history- A web chat interface is available, you can find it by navigating to the Steam Community Friend Activity page in your web browser- Added a caps lock warning indicator to the login dialog password textbox- Added support for better content sharing between games- Improved performance and responsiveness of client UI- Improved startup time for users with large screenshot folders- Prevent users from selecting an invalid screenshots folder- Suspend all downloads automatically when a game is launched- Added third party Mod support for games on new content system- Big Picture: Users can now add wallet funds and authorize microtransactions- Big Picture: In-game overlay now moves back on ESC when appropriate rather than closing directly- Added the date that SteamGuard was enabled in the settings dialog- Improved handling of international charactersFixes- Fixed several issues with scroll bars in the store and community views- Fixed forum links opening in external browser windows- Reduced retail install time when reading from optical disc on Windows XP/Vista- Removed "/me" chat command, which allowed some users to modify the color of their chat text- Fixed crash on startup caused by corrupt ClientRegistry.blob file- Fixed a top crash related to video streaming- Fixed an issue with cascading menu items- Fixed issue where some game installers cannot write to the registry- Fixed screenshots sometimes not showing up in screenshot manager when copied from another Steam installation- Big Picture: Fixed left/right navigation of game related sections in the in-game overlay- Big Picture: Fixed default font used by the in-game overlay- Fixed launching 64-bit games and applications- When a friend's status changes multiple times consecutively, only the last change will be shown (ie "Friend is now Online", "Friend is now Away" messages)- Fixed Windows error message "Disk not ready" in game install wizard- Made the preview image for guides smaller in the overlay- Caching guide preview images when viewed in the overlay- Added Ctrl+A select-all for system info textMac- Greatly reduced CPU usage and power consumption- Fixed command-W and other keyboard shortcuts- Fixed bugs with window management and the Window menu- Fixed leaks which caused memory usage to increase over time- Added partial support for Retina displays- Fixed bug with tooltips showing through Windows- Notification popups now respond on the first click- Web page views no longer freeze up after clicking and dragging the mouse- Clicking the dock icon now brings all Steam windows to the front