Normally when a question is closed as duplicate there is a link to the duplicate and the header looks like this:
But I noticed this question today that seems to have been closed as a duplicate but there is no link:
Strangely though, there is still a link in the 'Linked' questions part in the right hand column:
even though this link doesn't appear in any question, answer or comment.
What is going on here? Is this a weird anomaly, a new way of doing things, or something that's always existed that I don't know about?
