JR Curse
I think the junior worlds curse is a bit strange on pairs and ladies' singles, but seems to be more forgiving with dance and men. With dance, they tend to switch partners and become the dance team we know them as (Anissina and Averbukh split up and became two world champion teams; Todd Eldredge was a jr/sr world champion, as were Yagudin and Pluschenko)
The ladies and the pairs don't seem to have it too easy. Jessica Mills, Sydne Vogel, Kristina Oblasova, Yulia Soldatova, Yelena Ivanova, and a few others kinda disappeared after their senior win. I agree with the poster that mentioned that some skaters were beaten by others in Juniors that eventually kicked their behinds in seniors. The Russian sweep of 1996 (none of those Russians were ever heard from again, like Ivanova, Pingatcheva and Kanaeva. In fourth, fifth, and sixth were Suguri, Lipinski, and Gusmeroli).
Then, only in Juniors do we find (with the exception of maybe Lu Chen in seniors) a world champion one year, and out of the top ten the next year (Oblasova). The funniest results in men's were in 1994, when Mike Weiss won, Yagudin was 4th, Abt was 8th, and Ilia Kulik was 11th!!!!