An update has been released for Left 4 Dead 2.

General:
- Fixed loading screen showing placeholder text when playing mutations.
- Fixed a bug that always allowed Special Infected to spawn when a mutation was active.
- Fixed an out-of-range volume setting for one of Nick's lines.
- Fixed missing Russian audio in The Passing
- Fixed missing localized audio in No Mercy
- Improved stability when using hybrid graphics on Bumblebee

EMS Scripting:
- "ClearedWandererRespawnChance", percent chance (0-100) that cleared nav areas will get re-populated with wanderers.
- "Convars.GetClientConvarValue( cvar name, entindex )"
- "Convars.SetValue( cvar name, value )". Only server cvars can be set from script.
- player.IsDying()
- player.IsOnFire()
- player.Extinguish()
- Support for mode-specific population scripts, of the format "population_". New population names will be merged with the base script, matching population names will override the base script.

More...