An update has been released that we are rolling out now.

Update: This appears to have broken most servers on a global scale - we're chasing up information related to its stability and will update this post with more info as it comes in.

Update 2: A second update has been released and all servers should be functioning properly after a restart.

Release notes for 8/20 Update

Gameplay:
• Added the Weapons Course to the game.

UI:
• Voice notification can now show more players talking.
• Updated the freeze panel to no longer show the heath for your killer in competitive mode.
• Added an option in the menu to disable the game instructor messages.
• Update to the player info panel to no longer show achievement alerts.
• Update to the leaderboard screen to default to “Friends” filter.
• Added the “Total Games Played” leaderboard category.
• Updated the Play With Friends screen:
-- Made the chat window bigger so text is no longer cut off.
-- Adjusted the size of dimming when the focus changes between friends list and lobby list. It used to obscure the friends list and a little of the chat. Now it only obscures the friends list.

Bug Fixes:
• Updated the radio command panel so that the radio panel doesn't end up at the top of the screen during a mode that doesn't have a money panel.
• Set Classic Casual deadtalk to 0 to encourage fair play.
• Fixed the freeze panel dynamic positioning that would allow it to go too high.
• Fixed a missing text string displayed when player is not connected to Steam in leaderboards.
• Fixed a bug where the Mag7 could be bought by Ts via console commands.
• Fixed a bug where adding favorite server was not functional in the Community Server UI.
• Fixed a bug in the Play With Friends lobby where using left and right on keyboard or gamepad made the screen unresponsive.
• Fixed a bug in the Play With Friends lobby where typing in the Chat window would cause player names to flicker in the friends list.
• Fix for voice/chat/radio messages. Better unified the handling of voice and chat messages. 
-- Chat messages now correctly use sv_allchat (instead of sv_alltalk), which should be more consistent with other source games. 
-- Team-only communications now are not affected by sv_allchat/sv_alltalk, which means that private communications to one's team stay private, regardless of game mode. 
-- Team-only communication is also not overridden by sv_full_alltalk, which allows teams to privately communicate strategy during warmup time and intermission. 
-- Radio commands are considered team-only, so these should still be usable for tactics during games with sv_alltalk enabled (e.g. casual). 
-- Spectators no longer hear team-only communications, except when sv_spec_hear is mode 2 (hear/see comms of the spectated teams).

Audio:
• Increased the audible range of the c4 plant and disarm sounds.
• Fixed audio randomly chirping/screeching on certain levels.

Matchmaking:
• Tuned lobby distance computations when performing matchmaking.
• Exposed a convar ("mm_csgo_community_search_players_min") for community quick match to look for community servers having at least specified number of human players already playing.

Community:
• Shipped zombie model to support the Zombie Mod