Update: Infinity Ward’s Robert Bowling has revealed that the patch released for PC today is currently undergoing testing for Xbox 360 and PS3.
The reason for the delay from PC to consoles, is so IW can update IW-NET directly, as the console versions require additional testing through their respective manufacturers.
Original: Infinity Ward’s issued a patch for Modern Warfare 2 on PC, which will update automatically when you log into Steam.
The update fixes some bugs along with some anti-cheat and anti-hack measures relating to texture and XP.
Other changes include sprint speed normalization for the Care Package, Emergency Airdrop, and Sentry Gun marker grenades, along with improved placement detection for sentry guns, preventing cases of the guns appearing inside geometry – same with player collusion cases of getting into geometry and ‘elevators’.
The Model 1887: Bling using Akimbo and FMJ combination now has same range and damage as non-Bling Model 1887s and there has also been improvements made to mouse latency and movement consistency.
Full patch notes can be found over on Steam.
If the fixes aren’t enough to make you give Modern Warfare 2 a whirl, you can always Just Dance.