diff -up ./yawn.py.orig ./yawn.py

--- ./yawn.py.orig	2012-03-13 12:08:50.699204574 +0100

+++ ./yawn.py	2012-03-13 12:09:00.978254992 +0100

@@ -673,6 +673,7 @@ def _printInstRow(req, urlargs, keys, in

 ##############################################################################

 def Pickle(req, obj):

     req.add_common_vars()

+    req.content_type = "Text/HTML"

     ht = _printHead("Object", "Object Serialization", req)

     ht+= '
To pass the following object as a Parameter Reference to a method call, copy this string to your clipboard and paste it to the parameter field.
'

     ht+= '
'+obj+'
'