Fixed a bug which caused Windows Aero Extensions video option to always be enabled, regardless of setting. Disabling this can improve compatibility with third-party programs and overlays, but may also affect performance.



Fixed SourceTV showing player counts for the game server instead of the number of clients connected to the SourceTV server



Australian Christmas has begun!

Added community-contributed winter event items

Added new Grordbort Pyro and Engineer item sets

Added the "Valve Gift Grab 2011 – TF2" achievement

Added Naughty and Nice winter keys to the Mann Co. store



Added a new Valve-authored control point map: Foundry

added 12 achievements for Foundry

added achievement reward milestone reward for Foundry achievement



Added UGC Highlander medals



Relaxed some restrictions on what misc items can be equipped simultaneously



Additional improvements for client stability



Updated the localization files



Added the "Valve Gift Grab 2011 – DoD:S" achievement



Updated the localization files



Added the "Valve Gift Grab 2011 – CS:S" achievement



Added rate limiting for connections and added the following ConVars to support that:

sv_max_connects_sec

sv_max_connects_window

sv_max_connects_sec_global



Dramatically improved the dynamic model loading system's memory usage, performance, and stability



Reduced memory usage on systems running Windows XP, Windows Vista, and Windows 7



Improved alt-tab handling under Windows Vista and Windows 7



Fixed a client crash during demo playback



Updated the localization files



Updates to Team Fortress 2, Counter-Strike: Source, Day of Defeat: Source and Half-Life 2: Deathmatch have been released. The updates will be applied automatically when your Steam client is restarted. The major changes include: