After taking a few days off to, you know, play other things, I returned to "Modern Warfare 2" last night for some oft-enjoyable multiplayer. Unfortunately just about every game I joined was awash with people using the "javelin glitch." Without giving you clues on how to pull it off (I'm sure jerks can figure that out for themselves), it basically allows you to let loose a massive explosion the second you die. In short, you become a portable predator missile strike, killing anything within 30 feet of you. I played a few private matches instead.
But good news on the anti-glitcher front, as Infinity Ward has said that a fix is already in and is waiting for Microsoft and Sony approval. Also, Microsoft has said that it will hand out temporary bans to Live accounts caught using the exploit.
In the meantime, try a private match for a change. Party chat always works and you can play whatever maps or modes you want. Sure, you don't gain experience, but it's a heck of a lot more fun than getting blown up every two seconds.