The Left 4 Dead Blog announces "Headshot" as this week's new mutation for Valve's teamplay shooter. They explain that this quite simply requires headshots: "Shoot them in the arm, shoot them in the leg, shoot them in the chest - it just doesn't matter! The only way these zombies are going down is with a head shot. Other hits will stumble them back, but only a head shot or decapitation will kill them." They also outline some versus updates in the new Left 4 Dead 2 Patch that's automatically available, saying these changes will come to the Xbox 360 edition "in the near future." Here are the patch notes.

Addon Update

• Fixed a crash when the vpk file limit was reached.
• Fixed an issue where wireframes were displayed while playing Addon Campaigns.

Versus Updates

• Added a 25 point scoring penalty for using a Defibrillator.
• Scaled dynamic Defibrillators based on map length with a maximum of 1 per map.
• Removed dynamic Pill conversion to First Aid Kits.
• Removed Explosive Ammunition.
• Increased Jockey damage per second.
• Removed Jockey’s damage delay.