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 several problems with missing textures in community maps.
  
• Fixed a crash that could occur when stats get updated.
  
• Fixed a crash that could occur when displaying the scoreboard.
  
• Added "cl_show_achievement_popups", a convar that is on by default. Turning it off disables in-game achievement announcements.
  
• Restricted the range of commands that servers can cause clients to execute when closing the MOTD.
  
• Server admins will need to change the "cmd" key from a string to one of the following ints:
  
  • 0 for no command
    
  • 1 for joingame
    
  • 2 for changeteam
    
  • 3 for impulse 101
    
  • 4 for mapinfo
    
  • 5 for closed_htmlpage
    
  • 6 for chooseteam
    

Engine

• Fixed an exploit that allowed a plug-in to be loaded as a .dll file on the client after being downloaded from the server.
  
• Missed from last update:
  
  • Removed an exploit that allowed players to change their in-game name outside of the Steam Community
    

Linux Dedicated Server

• Fixed srcds_run so -autoupdate works properly for Counter-Strike: Source