Updates to Counter-Strike: Source and the Source Engine have been released. The specific changes include:

Counter-Strike: Source

    * Fixed a crash which could occur if the dynamic weapon price list failed to download


Source Engine

    * Added new cl_restrict_server_commands to prevent unwanted commands being run on game clients. The default value is 1, valid settings are:
          o 0 = Don't restrict any server commands
          o 1 = Restrict server commands in Valve multiplayer games
          o 2 = Restrict server commands in all multiplayer games
    * Decreased startup time in some cases by rate-limiting the packets sent to clients during logon
    * Improved responsiveness when entering map areas with lots of entities by automatically compressing large packet updates

Go in forum and download "counter-strike source client.gcf" . Only for free steam version.