Call of Duty: Black Ops Xbox 360/PlayStation 3 Title Update Changes

-Improved matchmaking to find matches significantly faster
-Improved matchmaking to ensure that players are more effectively matched to games with the best networking conditions
-Improved host selection to ensure that the best host is always selected in the pre-game lobby
-Improved party system to ensure that parties don't get broken apart
-Disable ability to join Private Match, Combat Training and Theater lobbies when searching for Player Match games
-Server-side and game-side changes to decrease the amount of failed Film uploads
-Weekly and Monthly leaderboards will now track all kills, deaths and assists properly (All Time leaderboards were not affected by this)
-Prevention of Combat Training stats getting crossed with Player Match stats under rare conditions
-Prevention of temporary loss of functionality when a button was being held down at the point of a disconnect
-Additional fine-tuning of audio levels and ranges for footsteps and gunfire
-Additional fine-tuning of audio levels for bomb plants/defuses
-Additional online security enhancements

Treyarch Post