Updates to Counter-Strike 1.6 have been released. The updates will be applied automatically when your Steam client is restarted. The specific changes include:

Counter-Strike 1.6

• Rolled back recent silent walking exploit fixes as we investigate less impactful ways of preventing the bug
  
• Adjusted bomb bounding box to prevent silent plant exploit
  
• Fix to eliminate or significantly reduce "flashbugs"
  
• Fixed status icons (buy zone, bomb zone, etc) disappearing when starting a recording, or issuing a fullupdate
  
• Prevent creating aliases using the same name as existing cvars
  
• Rate limit fullupdate and some other commands to prevent spamming
  
• Fixed an issue with grenades where they could go into an area and bounce infinitely, causing the server to choke and or crash

A Steam client update is now available. To apply the update, click the File menu inside of Steam and then select "Check for Steam Client Updates...". The specific changes include:

Steam Client

• Fixed reconnect issues with chat rooms
  
• Fixed clients in chat rooms getting into 'ghost chats' if they disconnect and reconnect from the Steam servers
  
• Fixed client hang if the server browser window was closed while the "Add server" window was open
  
• Fixed the name of mods being played not always showing to friends
  
• Fixed switching between fullscreen and windowed mode in a DX7 game with the overlay enabled
  
• Fixed texture corruption in OpenGL games with the overlay enabled
  
• Steamworks: added more logging & warning info for the networking API