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
  • Fixed the localization sound caches
  • Fixed AI tanks sometimes not getting assigned to human players
  • Fixed exploit in C6M2 where players could jump through a gap in the fence
  • Fixed commentary maps crashing on load

SDK
  • Removed Perforce integration and Manifest UI when running Hammer under and SDK deployment
  • Removed Version control menu for SDK
  • Material nudging only works if the user has nudging enabled