Corrected entry: At the end of the movie when the flags are being raised, they raise the Swedish flag with the American and Russian flags. Sweden finished fourth in the Olympics, and Finland finished second, but the Finnish flag wasn't raised in the movie. Also the hockey team on the ice with the Russians and Americans wore yellow, but in the previous scene of the Americans beating Finland shows the Finns wearing a grey jersey with a purple/maroon siding.
Corrected entry: When the US is playing the West German team in the Olympics, up on the score board the initials "GDR" are shown. The initials "GDR" stood for "German Democratic Republic," which was East Germany at the time. The initials for West Germany were "FRG" for "Federal Republic of Germany".
Corrected entry: As the USA team takes their places on the ice before one of the Olympic games (against Russia, I believe), Craig is shown in front of the goal with Rizzo and O'Callahan on either side of him. The next shot shows Rizzo in the foreground with Craig in the background putting on his goalie mask. The shot then cuts to O'Callahan in the foreground again with Craig in the background, and again showing Craig putting on his mask.
Corrected entry: Listen right before the famous "...five seconds to go. Do you believe in miracles? YES." Al Michaels, the announcer, suddenly sounds like he inhales a helium balloon; his voice goes so high.