I was playing Gears of War 2 at a very early hour this morning and got disconnected from Live during my session. After a chapter I decided to try to log back in, and it told me a title update was available and I needed to download it. I shot my browser over to the official Gears of War 2 forums and found the following thread.
Rod Fergusson says, just before the massive fix list:
Hey all, I'm happy to announce that Title Update 2 for Gears of War 2 is now available. It went live this morning at 2 AM PST (5 AM EST) and as you can see from the detailed release notes below, it's a significant update. It addresses a large number of multiplayer exploits and issues as well as makes some balancing tweaks, includes a couple of new features and even adds 7 new DLC-based achievements. Four of the new achievements require the Flashback Map Pack that came free with your new copy of the game, so don't forget to redeem your code inside the box! Once again, I want to thank our community for their patience while we finished this title update and I want to thank everyone for their ongoing support of the game. Gears 2 sales topped over 4 million copies sold in just two months and when we released the Combustible Map Pack in December, it became the number one piece of premium downloadable content for that month. We're continuing to work hard supporting the game and you, the community, and we look forward to seeing you online.
Among some of the bugfixes are some interesting ones, such as my favorite: "A Horde split-screen issue that could cause a team to get –2 billion in score, which when posted to the leaderboards looked like +2 billion."
Be sure to check out the full list of fixes at the link provided above. But is it too little too late for Gears of War 2 to get back to business for you?