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)

• Fixed a client crash bug caused by overflow of the audio cache
• Fixed a bug that allowed server browser network activity to continue after choosing a server

Team Fortress 2

• Added new promo items
• Unlocked the "What's in the Sandvich Box?"
• Unlocked the "What's in the Companion Square Box?"
• Fixed a server crash related to Demoman bot AI
• Updated the Tin Pot to use the correct skin for each style
• Fixed seeing the fire texture on Gold Botkiller items in DirectX 8
• Updated the localization files
• Updated Mann vs. Machine
  • Matchmaking search criteria supports selecting multiple missions
  • Mann Up servers will retry notification of mission victory to game coordinator, to ensure loot is eventually granted in the case of service disruption
  • Matchmaking will prevent late joining into the a server near the end of the last wave
  • Added a new currency UI element to indicate money that is active in the world
  • Added the tour number to the information on the scoreboard
  • Fixed the Medigun overheal duration attribute causing the overheal effect to decay faster, rather than slower
  • Added the ability to buy projectile penetration for the Crusader's Crossbow
  • Fixed a false positive for the achievement "Clockwork Carnage"
  • Added a new command "bot_hurt"
    • Parameters -name [bot name], -team [red/blue/all], -damage [amount]
  • Fixed the Demoman shields not saving their upgrades upon round reset
• Updated koth_king
  • Reflections fixed for the floors and some glass windows
  • Modified model file for the sign 6 through 9 to avoid Red signs on Blu side of the map
  • Modified light pole to merge bulb and pole into a single model for perf
  • Fixed location where mini-sentries can shoot through a bush without being seen
  • Clipping pass
  • Added glass on footbridge roof and lights nearby
  • Prop reduction for perf
  • Some props changed to non-solid for player mobility
  • Adjusted health and ammo in various spots
• Community requests:
  • Add a new server ConVar "tf_avoidteammates_pushaway" to control whether or not teammates push each other away when occupying the same space
  • Add a new server ConVar "tf_arena_override_team_size" to allow server owners to set the maximum team size in arena mode