http://english.yonhapnews.co.kr/Engnews/20070103/670000000020070103150945EP.html
And it's reported on FSU that she will miss Korean Nationals and maybe the Asian winter games. I'm not 100% sure whether that means she will miss worlds or not, but people are talking as if she'll go, so...???
The [South Korean Asian Winter Games team] is also to include up-and-coming figure skater Kim Yu-na, who had jumped to the top of women's figure skating with two gold medals in recent international competitions. However, Kim reportedly injured her back during an exercise on Tuesday.
And it's reported on FSU that she will miss Korean Nationals and maybe the Asian winter games. I'm not 100% sure whether that means she will miss worlds or not, but people are talking as if she'll go, so...???