diff --git a/lib/tables.py b/lib/tables.py
index 8b4aaf80e..a40a942f3 100644
--- a/lib/tables.py
+++ b/lib/tables.py
@@ -11,7 +11,7 @@ output (using standard tags like <table> and co.).
 import inspect
 import lxml
 from django.utils.translation import ugettext as _
-from django.template import Template, Context
+from django.template import Template, RequestContext, Context
 from django.template.loader import render_to_string
 
 class Column:
@@ -193,7 +193,7 @@ class Table(object):
   {% include "common/table_body.html" %}
 </table>
 """)
-            return t.render(Context({
+            return t.render(RequestContext(self.request, {
                         "table" : self, "tableid" : self.tableid
                         }))
         t = Template("""
diff --git a/static/pics/transparent.png b/static/pics/transparent.png
new file mode 100644
index 000000000..398ea4d8a
Binary files /dev/null and b/static/pics/transparent.png differ
diff --git a/templates/common/table_head.html b/templates/common/table_head.html
index 26436b9a9..71e681bc2 100644
--- a/templates/common/table_head.html
+++ b/templates/common/table_head.html
@@ -7,7 +7,7 @@
     <th id="{{ c.name }}" width="{{ c.width }}">
     {% endif %}
       {{ c|safe }}
-      <span style="float: right"><img style="display: none" alt="" src="" /></span>
+      <span style="float: right"><img style="display: none" alt="" src="{{ MEDIA_URL }}pics/transparent.png" /></span>
     </th>
     {% endfor %}
   </tr>