In its ongoing support of Left 4 Dead 2 on the PC, Valve has issued another patch for the game, fixing a number of problems including physics crashes and hit boxes on the Charger, Jockey and Spitter. Some of the exploits PC gamers have stumbled upon have also been eradicated, including incapped survivors improving their weapon accuracy by holding the crouch button -- though we wouldn't call that an exploit so much as a natural evolution in the face of the zombie threat. Good, old-fashioned human ingenuity is what will win us this war, people! You can head past the break for the full patch notes. An update for the Xbox 360 will be available "later this month."