Counter-Strike: Global Offensive Patch 1 October 2012

The update will be applied automatically when your Steam client is restarted
Valve has issued a new patch for Counter-Strike: Global Offensive (CS: GO) replacing Competitive mode "Join in Progress" matchmaking system with "Queued" matchmaking. Searching for a Competitive game, either from "Find a Game" or "Play with Friends," will enter the player/s ( between 1 and 5 ) into a waiting queue. Once 10 compatible players are found then the game will begin. And players that disconnect from a match can reconnect to it from the main menu or abandon it. Abandoning a game will result in a cooldown period during which no new competitive match can be joined. Note that Elo will be recalibrated for the new matchmaking system over the coming weeks.
The patch also includes two new maps: de_vertigo now available for Classic Casual and Classic Competitive and ar_monastery is now available for Arms Race.