Danger Close worked on tuning and polishing Medal of Honor: Warfighter right up until the last minute, with the release of a day one patch alongside the game today. The fixes should be ready and waiting for download as soon as you fire up Warfighter for the first time, but Electronic Arts has posted the extensive patch notes online to let you know which issues and glitch you'll (hopefully) never run into.
Of most interest to multiplayer fans is a tweak that eliminates the possibility of "no scoping," in which snipers can take advantage of soft aim in multiplayer to score quick and easy one shot kills. The fixes span all categories, however, including campaign and multiplayer, specific weapons, menu navigation, graphics, and plenty more. Check out the source link for the full list.