Updates to Counter-Strike: Source Beta have been released. The updates will be applied automatically when your Steam client is restarted. The major changes include:

Source engine changes
Added support for raw mouse input. Raw input reads directly from the mouse, bypassing Windows control panel mouse settings. This addresses issues with high DPI mice, and provides for a more reliable controller experience at various resolutions.
Improved custom mouse acceleration.
Updated mouse configuration UI ... [read more]

Updates to Counter-Strike: Source have been released. The updates will be applied automatically when your Steam client is restarted. The major changes include:

Counter-Strike: Source
Fixed performance issues and memory leaks related to scoreboard display.
Fixed long-standing bug in which a player would see another player in a grenade-throwing animation when they no longer had a grenade as their active weapon.
Fixed animation problem (“crab walk”) caused by aborting bomb plant by using... [read more]

Updates to Counter-Strike: Source Beta have been released. The updates will be applied automatically when your Steam client is restarted. The major changes include:

Counter-Strike: Source Beta
Fixed performance issues and memory leaks related to scoreboard display.
Fixed long-standing bug in which a player would see another player in a grenade-throwing animation when they no longer had a grenade as their active weapon.
Fixed animation problem (“crab walk”) caused by aborting bomb plan... [read more]

Updates to Counter-Strike: Source have been released. The updates will be applied automatically when your Steam client is restarted. The major changes include:

Counter-Strike: Source
Fixed incorrect distance on flashbang effect
Reverted changes to de_inferno and de_nuke
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Updates to Team Fortress 2 and Counter-Strike: Source have been released. The updates will be applied automatically when your Steam client is restarted. The major changes include:

Shared Changes (CS:S, DoD:S, TF2, HL2:DM)
ServerBrowser now sorts by ping by default once again.
Fixed Mac crash on launch when running Mac OSX 10.5.8.
Fixed spectator bug where spectating a Sniper looking through scope didn't zoom fov

Team Fortress 2
General Fixes
Fixed an issue that caused some old demos to crash.
... [read more]

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

Source Engine Changes (CS:S, DoD:S, TF2)
Optimizations to multi-core rendering
Removed -heapsize command line argument. Some detail: This command made sense in Half-Life 1’s memory manager. The current engine manages memory in a way that doesn’t need it specified. Under some circumstan... [read more]

Updates to Counter-Strike: Source Beta have been released. The updates will be applied automatically when your Steam client is restarted. The major changes include:

Counter-Strike: Source Beta
Optimizations to multi-core rendering
Get the full article at store.steampowered.com

Updates to Counter-Strike: Source Beta have been released. The updates will be applied automatically when your Steam client is restarted. The major changes include:

Counter-Strike: Source Beta
Fixed a bug where the player crouching/standing animations were delayed until after (from the player's local viewpoint).
Changed the way that scope zooming works so that it is no longer affected by client-server latency, and zooming begins immediately for the local player. This fixes an issue that would g... [read more]

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

Source Engine Changes (CS:S, DoD:S, TF2)
Disabled signature checking to determine if it's the source of some reported launch issues
Get the full article at store.steampowered.com

Updates to Counter-Strike: Source have been released. The updates will be applied automatically when your Steam client is restarted. The major changes include:

Counter-Strike: Source
Fixed a crash that could occur if a player disconnected shortly after attacking a bot
Get the full article at store.steampowered.com