Valve have released an update for their Source Engine along with the mod. Counter-Strike Source. The update contains several small changes. Steam News

CS:S Fixed an issue which was affecting player movement prediction Stopped players on de_dust2 being able to hide inside of rocks Added clipbrushes to de_train to prevent players from reaching certain areas Enabled bots to navigate their way out of the carts in cs_compound Source Engine (game server changes) Added "stats" command to print the current cpu usage, players and net bandwidth in use Fixed rcon responses to properly reflect request id's Added rate-limiting to connectionless queries to prevent flooding (as in HL1, the rate-limiting is controlled via the cvars: sv_max_queries_sec, sv_max_queries_sec_global, and sv_max_queries_window) Removed sv_allowlocalquery cvar Source SDK Added Snow and rain materials Added qc_eyes.exe Made various improvements and fixes to .FGD files Fixed an issue in Vrad which was causing visible artifacts when lighting very large objects/areas Fixed an issue in Studiomdl which was allowing bad $modelnames to be used Fixed the "cordon" texture used by Hammer