3 Dimensional Geometry and his other question.
I will look up the previous questions about contest problems in a minute. I was halfway through composing an answer, then I found http://www.mathcomp.leeds.ac.uk/ . I wrote them a letter, as I could not immediately identify which of their problems was involved. I guess you see the problems as pdf's after registering or something.
I understand this is not an emergency for MSE. Nevertheless, I really hate this.