Fourzerotwo (Robert Bowling), Community Relations Manager from Infinity Ward, writes: "You should no longer be receiving this error message or any other issues related to the firmware update in the game.
Thank you to everyone for giving us the heads up on this so we could start tracking down answers, and getting it resolved and please let us know if you have any additional issues."
Original story reported by CVG: "Today's 2.01 PS3 firmware update was released solely to fix instability issues on the console, but it's suspected it may have done the complete opposite for Activision's best-FPS-on-the-platform shooter, Call of Duty 4.
Dozens of angry gamers have hit the official forums to report that, since updating their PS3s this morning, they have been unable to play the online mode in the game. They obviously blame Sony's new firmware."
(Site requires logon. A screenshot from Fourzerotwo's reply is available below at the Alternative Sources.)