Updates to Counter-Strike: Source, Team Fortress 2 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)

• The mat_hdr_level, r_rootlod, and r_waterforceexpensive settings are now saved in the user’s config file.
  
• Fixed clients being able to connect to servers with spoofed SteamIDs.
  
• Fixed a bug where some video configurations could get reset by restarting the engine.
  
• Fixed materials compiled into a map not being loaded correctly if they're in the root materials folder.
  
• Fixed a case of uneven performance on multicore machines.
  
• Fixed point contents not respecting detail brushes. This fixes a bullet penetration bug in some community maps.
  
• Fixed clients being able to spam servers using the ai_set_move_height_epsilon, mission_show, and sv_querycache_stats commands.
  
• Audio fixes:
  
  • Reduced overlap in the sound timing code.
    
  • Fixed a case where audio could skip.
    
  • Fixed voice communication getting corrupted while playing on a Mac.
    
• sv_pure 2 now protects the game_sounds files in the scripts directory.
  

Counter-Strike Source

• Fixed prediction errors that were causing greater weapon inaccuracy (bullet spread) on client than server.
  
• Made the bomb the primary target of a +USE command. This fixes a problem with objects placed around the bombsite interrupting defuse attempts.
  
• Fixed the ‘skating’ behavior that could occur when a bomb planting attempt was aborted. Also fixes the resulting out of sync hit boxes.
  
• Fixed bug in which a player who crouched rapidly and repeatedly was seen as stationery by other players.
  
• Fixed problem in which the sound of a reload that was occurring when a player was killed persisted into spectator mode, making it sound like a reload was taking place near the spectated player.
  
• Gave chat interface priority over scoreboard to reduce conflict between the two.
  
• Increased size of HUD icons.
  
• Fixed bug with env_hudhint that caused problems when its value was greater than 255 characters.
  
• Made the message of the day screen dismissible by hitting ENTER.
  
• Fixed servers not being able to set sv_hudhint_sound.
  
• Gun sounds now match up with the framerate dependent sound timing, and fixed the framerate dependent jittering bugs.
  
• Stats:
  
  • Fixed an issue that could cause loss of player stats if network connectivity was lost briefly, just after launching the game.
    
  • Fixed an issue that caused the favorite weapon to display incorrectly on the stats summary page when a player achieves the most kills with a knife or grenade.
    
  • Made newly-earned achievements and stats immediately update in the achievements and stats panels instead of showing stale data.
    
  • Improved the font on the achievement toast.
    
• Community Requests:
  
  • Added cvar sv_enablebunnyhopping, defaulted to 0. ( A value of 1 autotags the server with "bunnyhop" )
    
  • De_dust and De_dust2 updated.
    
    • Fixed several exploits.
      
    • Fixed collisions on crenellation and domes.
      
    • Fixed minor visual glitches.
      
    • Adjusted HDR settings.
      
    • Removed dust clouds.
      
• Added console variable cl_hudhint_sound.
  

Team Fortress 2

• Added server ConVar "sv_max_usercmd_future_ticks" which prevents clients from running usercmds too far in the future.
  
• Added missing Mac intro movie for cp_coldfront.
  
• Fixed "Hit '%disguiseteam%' to Toggle Team" string and code so they're not hard coded to 'e' and '-'.
  
• Fixed servers trying to validate backpack positions in inventories.
  
• Fixed clients validating inventories other than their own.
  
• Fixed item selection HUD elements showing un-acknowledged items, which resulted in items in invalid backpack positions.
  
• Fixed players not always getting "recent damager" credit for player suicides.
  
• Fixed the weapon selection menu not displaying properly when using hud_fastswitch and lastinv at the same time.
  
• Updated Engineer startup music.
  
• Updated localization files.
  
• Updated Pl_ThunderMountain
  
  • Clipped off sticky outcrops for smoother movement
    
  • Clipped various exploit ledges
    
  • Increased environment ambient exterior light level
    
  • Stage 1
    
    • Fixed hole in respawn room brushes in RED spawn
      
    • Shifted respawn times to favor BLU by two seconds
      
  • Stage 3
    
    • Clipped rocks off by BLU's spawn exit that leads to building B (allowed Snipers to snipe the entire area)
      
    • Removed embedded displacement (building B interior roof)
      
    • Removed rogue clip brush from building A balcony
      
• Updated Plr_Hightower
  
  • Fixed players building in the RED spawn room.
    
  • Fixed players building on the back window decks of the barns.
    
  • Fixed players getting on the satellite dish platform.
    
  • Fixed players building on the elevators.
    
  • Reduced the ammo packs in the barns down to small ammo packs.
    
  • Increased the hill speed modifier to 1.2 (up from .95)
    
  • Fixed explosion particle effects playing in the skybox.
    
  • Mine cart "window" collision fixed.
    
  • Upped Scout-loop health to large.
    
• Updated Pl_Upward
  
  • Fixed respawnroom entities not reaching the floor of split-level spawns
    
  • Fixed griefable fence facing BLU spawn near RED base
    
  • Added BLU high flanking route at RED base
    
  • Added health & ammo along BLU flanking route at RED base
    
  • Sealed BLU base left exit with block bullets brushes
    
  • Extended clip between C and BLU spawn to prevent sticky jump spawn camping
    
  • Fixed non-clipped non-solid railing in RED base
    
  • Fixed kill brush in middle spawn not extending to the ceiling
    
  • Put a block bullets brush on grate below middle spawn
    
  • Fixed some high micro-ledges accessible to sticky-jumpers
    
• Community Request
  
  • Added "item_pickup" game event for ammo/health packs.