This is probably unrelated, but I noticed that this question of Carl Mummert on MSE got five unexplained downvotes. I don't have the slightest idea why, and I find this very perplexing. (Perhaps people who, unlike me, know some logic can guess the reason for the downvotes, but even if this reason exists, I find disturbing that none of the downvoters cared to give an explanation.)

I of course fully agree with David, but I think that, even with proper attribution, there is no reason X should post Y's result on the arXiv.

@Konrad - Dear Konrad: Thanks! I still hope Joël will edit his post...

Dear Joël: Didn't you forget to end the sentence starting with "On the other hand,"?