Valve has released and update that should fix a few issues with Left 4 Dead 2.
Here’s the list:
- Fixed case where game failed to launch in certain machine configurations
- Fixed bug where a burning witch could get into a state where she’s invincible (after Molotoving her)
- Fixed bug where bots would not shoot at Jockeys and Chargers while approaching to save a teammate
The update will be applied when you log into Steam.