An update to Left 4 Dead 2 Beta has been released. The update will be applied automatically when you restart Left 4 Dead 2 Beta. The major changes include:

- Improved scripted template entity spawning performance
- Don't allow Mac and Linux clients to load plug-ins without -insecure

EMS
- ent.GetOwnerEntity() - return an entity's owner
- player.SetReviveCount( count ) - set the number of times a survivor has been revived, and update third-strike state and effects
- player.ReviveFromIncap() - revive an incapped player
- player.ReviveByDefib() - revive a dead player by defib
- player.HitWithVomit() - target a player with a vomit attack
- player.Stagger( position ) - stagger a player away from a position. Use Vector(0,0,0) to just stagger forward.
- player.IsDead()
- Player.GiveUpgrade( upgrade ) - give a primary weapon upgrade
- Player.RemoveUpgrade( upgrade ) - remove a primary weapon upgrade
Upgrades: UPGRADE_INCENDIARY_AMMO, UPGRADE_EXPLOSIVE_AMMO, UPGRADE_LASER_SIGHT
- DropSpit( location ) - drop a spit pool from the specified vector location
- DropFire( location ) - drop a fire pool from the specified vector location