As reported in the previous news post, MW2 is already being sold in some stores and at the same time being pirated by Xbox 360 users. Apparently many players have started playing online matches with each other and Infinity Ward is not too thrilled about.
Robert Bowling - "It definitely looks like a full leaderboard / level reset is in order just before the release date to ensure no unfair advantages."
Expect to see many Xbox Live bans in the following days, since many players are playing with modded Xbox 360 consoles online.
Also, thanks to everyone for sending those new gameplay videos. The Perks have been updated again - we are only four Pro perks away from a complete list. The Killstreaks page is pretty much done, except for some minor details.
All the pages will be updated/redone in the following weeks, after the official release.