Valve has just released a very big patch for Left 4 Dead fixing a number of problems and bringing quite a few improvements to the game. The L4D patch is live for PC owners ready, but the Xbox 360 patch for the game will be released in the “coming weeks” as Valve announced. Until then, you can see below some of the most important changes brought by the patch (which will be automatically applied via Steam). For the full change list, go here.

General
– Fixed Survivors being able to climb surfaces marked for versus infected only
– 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 several map exploits

Versus Changes
– Changed color of infected player name in chat to red
– Fixed exploit where infected players could run away and teleport back to gain health
– Players can only change teams once per map
– Tank spawns at the same % through the map for both teams in versus mode
– Increased chance of getting the Tank or Witch

Smoker
– Fixed Smoker tongue tolerance
– Smoker now has to be killed or the tongue destroyed for the tongue to break
– 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

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