An update for Left 4 Dead 2 was also just released. Let's check out the changelog, shall we?
The update should be automatically applied the next time you start up Steam.
- Reduced Dedicated Server max search ping to 150 ms
- Teams that prefer listen servers will no longer be matched with teams that prefer dedicated servers
- Official dedicated servers are now preferred when searching for team matches
- More populous lobbies are now preferred over less populous ones when searching for games
- Players who crash or have failed to load are no longer banned if they have been kicked
- Update Russian subtitles
- Fixed not being able to interlink teams in team-on-team mode
- Fixed not being able to properly migrate team lobby after team leader would leave the lobby
- Fixed not being able to invite friends if player was not team leader in a team-on-team game