--- a/UI/Previewers/PreviewerHTML.py	Sun Dec 21 15:36:59 2014 +0100
+++ b/UI/Previewers/PreviewerHTML.py	Sun Dec 21 18:00:20 2014 +0100
@@ -471,8 +471,13 @@
                 """ <a href="http://pypi.python.org/pypi/docutils">"""
                 """this page.</a></p>""")
         
-        return docutils.core.publish_string(text, writer_name='html')\
+        # redirect sys.stderr because we are not interested in it here
+        origStderr = sys.stderr
+        sys.stderr = io.StringIO()
+        html = docutils.core.publish_string(text, writer_name='html')\
             .decode("utf-8")
+        sys.stderr = origStderr
+        return html
     
     def __convertMarkdown(self, text):
         """