diff --git a/resources/i18n/en-GB.edn b/resources/i18n/en-GB.edn
index 442f097..29dca4f 100644
--- a/resources/i18n/en-GB.edn
+++ b/resources/i18n/en-GB.edn
@@ -81,6 +81,8 @@
                                         ;; Text introducing the link to an uploaded file
  :file-upload-prompt    "File to upload" ;; prompt string for the file upload widget
  :file-upload-title     "Upload a file" ;; title for the file upload page
+ :fix-and-restart       "After fixing these problems you must restart Smeagol"
+                                        ;; used in sanity check report
  :is-admin-prompt       "Is administrator?"
  :here                  "here"          ;; used in sanity check report
  :history-link          "History"       ;; text of the history link on the content frame
diff --git a/resources/templates/edit.html b/resources/templates/edit.html
index 840491d..9b2023f 100644
--- a/resources/templates/edit.html
+++ b/resources/templates/edit.html
@@ -4,8 +4,8 @@
     <script src="https://cdnjs.cloudflare.com/ajax/libs/simplemde/1.11.2/simplemde.min.js"></script>
     <link href="https://cdnjs.cloudflare.com/ajax/libs/simplemde/1.11.2/simplemde.min.css" rel="stylesheet" type="text/css" />
   {% else %}
-    {% style "vendor/simplemde/dist/simplemde.min.css" %}
-    {% script "vendor/simplemde/dist/simplemde.min.js" %}
+    {% style "/vendor/simplemde/dist/simplemde.min.css" %}
+    {% script "/vendor/simplemde/dist/simplemde.min.js" %}
   {% endifequal %}
 {% endblock %}
 
diff --git a/src/smeagol/sanity.clj b/src/smeagol/sanity.clj
index e0a57f3..f16a127 100644
--- a/src/smeagol/sanity.clj
+++ b/src/smeagol/sanity.clj
@@ -120,7 +120,6 @@
   configured content directory."
   ([path]
   (compound-check-results
-    (check-with-protection check-exists :file-or-directory path :content-dir-exists)
     (check-with-protection check-is-dir :file-or-directory path :content-dir-is-dir)
     (check-can-read-and-write path :content-dir)
     (apply compound-check-results
@@ -133,6 +132,25 @@
    (check-content-dir util/content-dir)))
 
 
+(defn check-upload-dir
+  "Check that the upload directory at `path` (defaults to configured upload path)
+  exists and is readable and writable; check that each of the configured
+  thumbnail subdirectories also exists and is writable."
+  ([path]
+   (compound-check-results
+     (check-with-protection check-is-dir :file-or-directory path :upload-dir-is-dir)
+     (check-can-read-and-write path :upload-dir)
+     (apply
+       compound-check-results
+       (map
+         #(let [p (cjio/file path (name %))]
+            (compound-check-results
+              (check-with-protection check-is-dir :file-or-directory p :thumbnails)
+              (check-with-protection check-can-read-and-write :file-or-directory p :thumbnails)))
+         (keys (:thumbnails config))))))
+  ([] (check-upload-dir util/upload-dir)))
+
+
 (defn check-password-member-field
   "Check that this `member` map, expected to be an entry from the passwd
   file whose key was `user-key`, has this `field` and if not return a
@@ -221,13 +239,14 @@
 
 
 (defn check-everything
-  ([content-dir config-path passwd-path]
+  ([content-dir upload-dir config-path passwd-path]
   (compound-check-results
     (check-content-dir content-dir)
+    (check-upload-dir upload-dir)
     (check-config config-path)
     (check-password-file passwd-path)))
   ([]
-   (check-everything util/content-dir config-file-path password-file-path)))
+   (check-everything util/content-dir util/upload-dir config-file-path password-file-path)))
 
 
 (defn- get-causes
@@ -367,7 +386,8 @@
    [:a
     {:href
      "https://github.com/journeyman-cc/smeagol/wiki/Deploying-Smeagol"}
-    (as-hiccup :here messages)] "."])
+    (as-hiccup :here messages)] ". "
+   (as-hiccup :fix-and-restart messages) "."])
 
 
 (defn as-hiccup-footer