diff --git a/static/style/style_neutral.css b/static/style/style_neutral.css
index 40ba174..f949674 100644
--- a/static/style/style_neutral.css
+++ b/static/style/style_neutral.css
@@ -53,6 +53,17 @@ div.top_menu input {
   margin-right: 4px;
 }
 
+div.top_menu .menu_button {
+  position: relative;
+  float: left;
+  top: 4px;
+  width: 16px;
+  height: 16px;
+  border-radius: 2px;
+  margin-left: 4px;
+}
+
+
 div.top_menu input:hover {
   background-color: #FF5D00;
 }
diff --git a/static/style/style_tth.css b/static/style/style_tth.css
index 65f7ff9..fcfc514 100644
--- a/static/style/style_tth.css
+++ b/static/style/style_tth.css
@@ -53,6 +53,17 @@ div.top_menu input {
   margin-right: 4px;
 }
 
+div.top_menu .menu_button {
+  position: relative;
+  float: left;
+  top: 4px;
+  width: 16px;
+  height: 16px;
+  border-radius: 2px;
+  margin-left: 4px;
+}
+
+
 div.top_menu input:hover {
   background-color: #FF5D00;
 }
diff --git a/templates/error.html b/templates/error.html
index 0e00af4..2db7adb 100644
--- a/templates/error.html
+++ b/templates/error.html
@@ -4,7 +4,7 @@
     <title>Tetastock</title>
     <meta name="viewport" content="initial-scale=1.0">
     <meta http-equiv="content-type" content="text/html; charset=UTF-8" />
-    <link rel="stylesheet" type="text/css" href="/static/style/style_{{ css }}.css" />
+    <link rel="stylesheet" type="text/css" href="/static/style/style_neutral.css" />
     <script type="text/javascript" src="/static/scripts/tetalab.js"></script>
   </head>
   <body>
diff --git a/templates/index.html b/templates/index.html
index 6386cbc..54835e4 100644
--- a/templates/index.html
+++ b/templates/index.html
@@ -17,7 +17,7 @@
       </div>
       <div class='top_menu'>
         {% block top_menu %} <span class='top_menu_item_selected' onclick='javascript:document.location="./";'>Accueil</span> {% endblock %}
-        <input type='image' src='/static/images/menu.png' title='Afficher/Cacher menu' value='' onclick='javascript:switch_css("{{ css }}");' />
+        <input type='image' class='menu_button' src='/static/images/menu.png' title='Afficher/Cacher menu' value='' onclick='javascript:switch_css("{{ css }}");' />
         <input type='image' src='/static/images/logout.png' title='Se deconnecter' value='' onclick='javascript:logout();' />
       </div>
       <div class='content_wrapper'>
diff --git a/tetastock.py b/tetastock.py
index aa30817..ea9c882 100755
--- a/tetastock.py
+++ b/tetastock.py
@@ -301,6 +301,7 @@ def resume_session(func):
 # Routes
 ########################################################################
 @app.errorhandler(404)
+@resume_session
 def page_not_found(e):
   """ 404 not found """
   return render_template('error.html', css=session[u'css']), 404
