On our front page, we have now the following question:

Graph having diameter k times the average distance [closed]

If you click on the link, you are redirected to a "Page Not Found" error message at math.stackexchange.com.

Perhaps this is related to a question that was first migrated and then deleted, but the end result is certainly confusing. And it bothers me a bit: a question has been closed, but I cannot read the question or the reason why it was closed.