Even though Call of Duty: Modern Warfare 2 is mere months away, developer Infinity Ward continues to support the first Modern Warfare title. Call of Duty 4: Modern Warfare was released in 2007, to critical acclaim and massive worldwide sales. But it wasn’t without its share of problems.
Case in point, Community Moderator thebigb82 has announced on the Infinity Ward forums that Sony Computer Entertainment of America (SCEA) has released Patch 1.40 for the PS3 version of Call of Duty 4: Modern Warfare. You will be able to download the patch when you get in the game, and it will address things like glitching and modding in order to give the community a fair playing environment in which to partake in.
And also please note that European users of the title have not yet received the patch, and Infinity Ward will most likely announce when that will hit as well.
[Source]