Game and client changes
-Introduced fatigue to the melee attack in versus mode. You will see a HUD display when your melee swing is cooling down
-Boomer vomit will now pass through common infected
-Addressed some surround sound detection issues
-Fixed a rare crash when exiting Left4Dead on Windows Vista
-Fixed a case where the complete all expert campaigns achievement was not being rewarded
Really pointing out the first one. Wonder how all the 'corner tricks' will be effected by this...or even survivability in general when the hordes come...