Looks like Call of Duty 3 received their auto-update a lot faster than CoD2 ever did. In this update, there are several updates and fixes. Next time you log in, you will get the update. From the Xbox.com CoD thread:

Call of Duty fans,

A quick note to check in and let you know that were in final test for the Call of Duty 3 multiplayer Title Update and that we hope to be released to the Xbox Live community in the coming days. We really want to thank everyone again for their continued support and feedback you have been a tremendous help.

When it propagates, the update will download automatically upon logging into Xbox Live and running Call of Duty 3. This update addresses many of the Ranked and Player Match issues that weve discussed over the last few weeks. While weve made a number of enhancements, the most significant improvement is that Ranked Matches join lobbies much faster through both Custom and Quick Match. Player Matches through Quick Match will now query a higher number of games before attempting to join, thus returning a better variety and better quality for the player.

Additionally, weve added some gameplay, HUD and options enhancements. For example, brightness settings will be saved across both single-player and multiplayer; players will be able to instantly punish medics who maliciously team kill and revive continuously; Auto Team Balance will remain turned on after multiple map rotations, ensuring that each team always has an equal number of players; and players will be able to select either Axis or Allies in Ranked Battle games.

These enhancements will create a more streamlined gameplay experience; however, please be aware that online play is always complicated by players with non-optimal router and connection settings dont hesitate to refer to Xbox Lives best practices for router configurations, as it will prove helpful.

Thanks!

- COD3 Multiplayer Team