diff --git a/core/TESTS/test_caves.py b/core/TESTS/test_caves.py
index e80d5b4..437648a 100644
--- a/core/TESTS/test_caves.py
+++ b/core/TESTS/test_caves.py
@@ -79,6 +79,8 @@ class FixturePageTests(TestCase):
     """
 
     # The fixtures have a password hash which is compatible with plain-text password 'secretword'
+    # The hash CHANGES whenever Django upgrades the encryption key length. Better to create the test uses
+    # algorithmically and not via a fixture.
     fixtures = ["auth_users", "expo_caves", "expo_exped"]
     ph = r"and leads in 800m of tortuous going to"
 
diff --git a/core/views/expo.py b/core/views/expo.py
index c8d9482..fadc6ed 100644
--- a/core/views/expo.py
+++ b/core/views/expo.py
@@ -57,7 +57,9 @@ def expofiles_redirect(request, filepath):
     return redirect(urljoin("http://expo.survex.com/expofiles/", filepath))
 
 def spider(request, _):
-    return redirect("/?#") # so that suffixes applied by spider are no longer part of the url
+    # urls ending in "_edit_edit" 
+    return render(request, "pagenotfound.html", {"path": path}, status=404)
+    # return redirect("/?#") # so that suffixes applied by spider are no longer part of the url
 
 def map(request):
     """Serves unadorned the expoweb/map/slippy/map.html file"""
diff --git a/templates/pagenotfound.html b/templates/pagenotfound.html
index 49132f0..913c092 100644
--- a/templates/pagenotfound.html
+++ b/templates/pagenotfound.html
@@ -19,28 +19,28 @@ div#editLinks a{
 }
 </style>
 {% endblock %}
-{% block title %}Page not found {{ path }}{% endblock %}
+{% block title %}Page not found '{{ path }}'{% endblock %}
 
 {% block body %}
-<h1>Page not found {{ path }}</h1>
+<h1>Page not found '{{ path }}'</h1>
 
-  <div id="editLinks"> {% block loginInfo %}
-    <a href="/">Home</a> |
-    <a id="cuccLink" href="http://camcaving.uk/">CUCC</a> |
-    <a id="expoWebsiteLink" href="http://expo.survex.com">expo.survex</a> |
-    {% if user.username %}User:{{ user.username }}
-    {% if user.person %}(<a href="{{ user.person.get_absolute_url }}">{{ user.person }}</a>){% endif %}
-    | <a <a href='/accounts/logout/'>Log out</a> {% else %} <a href='/accounts/login/'>Log in</a> {% endif %}
-   </div>
-    {% endblock%}
+<div > 
+{% if user.username %}user: '{{ user.username }}'
+    | <a <a href='/accounts/logout/'>Log out</a> 
+{% else %} <a href='/accounts/login/'>Log in</a> 
+{% endif %}
+</div>
+ 
     
 <p>Probably a mistake. 
 This page does not exist. 
-
-Did you mistype a URL? 
-If you do want to create this page click <a href="{%url "editexpopage" path %} ">this link</a>.
+Did you mistype the URL '<b>{{ path }}</b>' ?
+{% if user.username %}
+    <p>
+    If you do want to create this page, click <a href="{%url "editexpopage" path %} ">this link</a>.
+{% endif %}
 <p>
- 
+ <p>
  <p>Did you get lost ?</p>
  
  <img align=center src="/handbook/i/204-area.png">