diff --git a/app/views/lvas/show.html.erb b/app/views/lvas/show.html.erb
index 9dec3de..82c6a46 100755
--- a/app/views/lvas/show.html.erb
+++ b/app/views/lvas/show.html.erb
@@ -74,6 +74,7 @@
       </div>
     </div>
 
+
     <div class="row-fluid">
       <div class="span12">
 
@@ -82,11 +83,12 @@
 	</p>
 	<%= link_to t("beispiel.zip") , beispiel_sammlung_lva_path(@lva), class: :linkbox %>
 	<% @lva.beispiele.order(:datum).each do |b| %>
-	<% cache("beispiel_"  +I18n.locale.to_s+b.id.to_s+can?(:delete,b)+"_"+can?(:edit,b) + "_" + b.updated_at.try(:utc).try(:to_s)) do %>
+	<% cache("beispiel_"  +I18n.locale.to_s+b.id.to_s+can?(:delete,b).to_s+"_"+can?(:edit,b).to_s + "_" + b.updated_at.try(:utc).try(:to_s)) do %>
 	<%= render b%>
 	<% end %>
 	<% end %>
       </div>
+
     </div>
 
     <div class="row-fluid">
diff --git a/public/404.html b/public/404.html
index 9a48320..3c16ac6 100755
--- a/public/404.html
+++ b/public/404.html
@@ -5,15 +5,17 @@
   <style type="text/css">
     body { background-color: #fff; color: #666; text-align: center; font-family: arial, sans-serif; }
     div.dialog {
-      width: 25em;
-      padding: 0 4em;
-      margin: 4em auto 0 auto;
+      max-width:100%;
+      padding: 0 1em;
+      margin: 1em auto 0 auto;
       border: 1px solid #ccc;
       border-right-color: #999;
       border-bottom-color: #999;
     }
     h1 { font-size: 100%; color: #f00; line-height: 1.5em; }
   </style>
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+
 </head>
 
 <body>
@@ -21,6 +23,8 @@
   <div class="dialog">
     <h1>The page you were looking for doesn't exist.</h1>
     <p>You may have mistyped the address or the page may have moved.</p>
+    <p><a href="/">return to main page</a>
   </div>
+
 </body>
 </html>
