Perhaps the challenge was not really finished ? ( I had a choice editor which disppears because the owner challenge changes his mind )
Perhaps a technical problem with The site In this case try the link contact us
Jan 23, 2009

I know what is happened, cause I had the same problem. look on the right side of the winning page for the name of the challenge, when the challenge is gone, then it is removed by the challenge owner.
Mar 13, 2009