Product Update - Valve
Updates to Left 4 Dead 2 have been released. The updates will be applied automatically when your Steam client is restarted. The major changes include:

Left 4 Dead 2
  • New mutation: Last Man On Earth
  • Blocked a map exploit at the start of The Passing
  • Fixed a crash if a Spitter lost her spit target mid-attack
  • Updated video config for new NVIDIA cards
Product Update - Jason Ruymen
Updates to Left 4 Dead and Left 4 Dead 2 have been released. The updates will be applied automatically when your Steam client is restarted. The major changes include:

Left 4 Dead
  • Fixed an issue where servers wouldn't relist after the master server was bounced

Left 4 Dead 2
  • Fixed a Linux dedicated server crash
...