I was following this question for a while and all of a sudden
konrad has appeared in the thread:
What was his involvement?
Can't see any reference to
konrad being there.
More than likely Konrad posted an answer that has since been deleted. Deleted posts are hidden from people with less than 10K reputation, but he still did update that question/its answers. (I don't have enough reputation to see, but it's consistent with an answer deletion.)
And, to be pedantic, we don't have "threads" here.