Updates to Left 4 Dead 2 have been released. The updates will be applied automatically when your Steam client is restarted. The major changes include:

Left 4 Dead 2

• Encore Mutation: Bleed Out Versus
  
• Decreased the spawn distances in finales
  
• Pressing the use key (default "E") during a finale while in ghost spawn mode will teleport the infected player to a survivor's location