Left 4 Dead 2 updated on Steam, fixes witch and bot issues

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.