this question is an interesting case for moderation I think
in all these years, nobody has felt confident enough to post an answer to it
yet the comments are teeming with answers
by established users who are still active
would it be a good idea to ask them to post speculative answers?
I don't think we can help the OP as it's unlikely that the real cause will ever be established now (and the situation introduces so much uncertainty - not least that the OP is posting on behalf of someone else), but it seems like such answers would be perfectly valid and useful to visitors
@Zanna sorry, what I said was incorrect, actually there is one answer, but nobody has had the confidence to vote on it (apart from one low rep or unregistered visitor who downvoted it)
