The links in the forwarded email are 404.
The diff for the recent change is actually:
https://www.wikidata.org/w/index.php?title=Q594&curid=873&diff=8100…
I've seen this in several such mails in the last few days.
---------- Forwarded message ----------
From: MediaWiki Mail <wiki(a)wikimedia.org>
Date: 23 October 2013 18:37
Subject: Wikidata page Q594 has been changed by Snipre
To: XXXXXXXXXXX
Dear Pigsonthewing,
The Wikidata page Q594 has been changed on 23 October 2013 by Snipre, see
http://www.wikidata.org/wiki/Q594 for the current revision.
See
http://www.wikidata.org/w/index.php?title=Q594&diff=next&oldid=7943…
to view this change.
See
http://www.wikidata.org/w/index.php?title=Q594&diff=0&oldid=79436893
for all changes since your last visit.
Editor's summary: /* wbremoveclaims-remove:1| */[[Property:P243]]:
166687972
Contact the editor:
mail:
http://www.wikidata.org/wiki/Special:EmailUser/Snipre
wiki:
http://www.wikidata.org/wiki/User:Snipre
There will be no other notifications in case of further activity unless
you visit this page. You could also reset the notification flags for all
your watched pages on your watchlist.
Your friendly Wikidata notification system
--
Andy Mabbett
@pigsonthewing
http://pigsonthewing.org.uk