These days in Korea there are many demonstrations when Korean worry about the impact of American mad beef to their health. It's one of the factors which make the trust in Lee Myung Bak, new Korean president, is going down. Also there are many titles on newspapers talk about America-Korea piplomacy under the name of "Beef-piplomacy" (Korean government wants a FTA with America so they need to open beef market in Korea to American beef producers).
Maybe they, Korean, worry about mad beef a little, but if you live in Korea, you already know that they're trying to protect their benefit. The price of Korean beef is over 2-3 times of Australian beef. It's too expensive.