So I found out more info, I think it's done by these people
http://www.thetechgame.com/Forums/file=viewtopic/t=15212.html and apparently it spreads and you have it until you turn your xbox off. I wonder how many months it will take for them to patch this, it could really start getting annoying to play MW:2.
*Edit*
Other things the mod does it make you play ground war on rust, witch I also had. I guess this explains why I was having so many problems last night.
It spreads like a virus. So when you get it you have it until you turn your xbox off, if you host a match, the game will be the glitch, and it will spread to the other people. This is going to get bad. IW really messed up.
*Edit*
It's all over the IW forums.
http://www.infinityward.com/forum/viewtopic.php?f=26&t=217174*Edit*
Okay I can't even play the game with out being in a glitched server.