Call Of Duty: Black Ops has been patched on Xbox 360 and PlayStation 3.

The updates are said to improve matchmaking speed and quality, as well to ensure the best host is selected before the start of each game.

Kills, deaths and assist counts are now recorded properly in the leaderboards, while audio levels for footsteps, gunfire and bomb plants have been fine-tuned.

On Xbox 360 additional security enhancements have been installed, while PS3 users with a large friends list will see improved performance.

It was added that rare glitches that see the loss of control with Valkyrie and Gunship killstreaks are being looked into.