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:

Engine

• Fixed client crash related flashlight usage.
  
• Fixed several issues related to alt-tabbing (invisible players, etc).
  

Team Fortress 2

• Added The Frontier Justice.
  
• Added The Wrangler.
  
• Added The Gunslinger.
  
• Added The Southern Hospitality.
  
• Added 35 Engineer achievements.
  
• Engineers can now pickup & move their buildings.
  
• Added Engineer main menu music.
  
• Added 4 new maps:
  
  • Thunder Mountain, a 3 stage Payload map.
    
  • Hightower, a Payload Race map.
    
  • Upward, a Payload map.
    
  • ColdFront, a community built Capture Point map.
    
• Item tuning:
  
  • The Sandvich now uses a cooldown timer, instead of the health pack recharge mechanic.
    
  • The Gunboats now reduce self-damage by 60% (was 75%)
    
  • The Tribalman's Shiv bleed duration reduced to 6 second (was 8), and its damage penalty increased to 50% (was 35%).
    
• Added better feedback sound for Pyros on when their flamethrower is doing damage.
  
• Fixed blood effect on bleeding player.
  
• Added a glow effect to Payload carts.
  
• Added Romanian language support.