http://store.steampowered.com/news/2162/

General

* Fixed Survivors being able to climb surfaces marked for versus infected only
* Fixed a class of SurvivorBot bugs dealing with rescuing downed players
* Players can no longer grab ladders while flying through the air after a Tank punch
* Shooting near a car with an alarm that has already fired the alarm will no longer make chirping noises
* Improved loading time
* Fixed mini-gun physics exploit
* Fixed propane tanks (and other physics objects) causing players to fall through elevators
* Fixed rare achievement bug issues
* Fixed several map exploits
* Fixed various match making issues
* Fixed NAT traversal issues


Versus Changes

* Added HUD elements to show status of other infected players
* Changed color of infected player name in chat to red
* Fixed exploit where players could spawn infected bots
* Fixed instance where a Survivor changing to the infected team would be attacked by infected bots
* Normalized special infected melee damage
* Made the following client commands cheat protected: "Kill" and "explode"
* Fixed exploit where infected players could run away and teleport back to gain health
* Players can only change teams once per map
* Players can't change teams while other players are still loading
* Tank spawns at the same % through the map for both teams in versus mode
* Made the Tank and Witch spawn directly on the escape route
* Increased chance of getting the Tank or Witch
* Fixed team swap issue


Hunter

* Easier to pounce a Survivor who is meleeing
* Increased Minimum damage a Hunter pounce does


Smoker

* Fixed Smoker tongue tolerance
* Smoker now has to be killed or the tongue destroyed for the tongue to break
* Survivor's cannot bash someone off the tongue until the Survivor being pulled is paralyzed or hanging
* Tongue attacks that fail to paralyze or hang a Survivor will use the shorter ability delay timer
* Fixed cases where the ability timer was not using the correct time
* Fixed case where you could point at a Survivor but not register a tongue hit
* Fixed Smoker tongue not targeting and landing properly through PZ ghosts
* Smoker tongue does damage every second while dragging paralyzed Survivors


Tank

* Bashable objects now appear with a red glow
* Tanks hitting a car with an alarm disables the alarm permanently
* Tank frustration timer is only reset by hitting Survivors with rocks or fists
* Reduced autoshotgun damage against Tanks


Witch

* Witch spawns at the same % through the map for both teams
* Avoids spawning within a certain % of the tank
* Fixed an exploit where the Witch could be woken up and tricked into attacking Survivors