Updates to Team Fortress 2, 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: Source Engine Changes (TF2, DoD:S, HL2:DM)

• 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