Index: library/lib/pp.tcl
===================================================================
diff -u -r3df933477f01d26d32220be5a1c87bfc0c5b7685 -r4b6b7c0bc888ac7bce807710e649a0748d093573
--- library/lib/pp.tcl	(.../pp.tcl)	(revision 3df933477f01d26d32220be5a1c87bfc0c5b7685)
+++ library/lib/pp.tcl	(.../pp.tcl)	(revision 4b6b7c0bc888ac7bce807710e649a0748d093573)
@@ -206,7 +206,7 @@
 
   :public method render {-noCSSClasses:switch block} {
     set :output ""
-    :puts "<style>"
+    :puts "<style type='text/css'>"
     :puts ".nx             {color: #000000; font-weight: normal; font-style: normal;}"
     :puts ".nx-string      {color: #779977; font-weight: normal; font-style: italic;}"
     :puts ".nx-comment     {color: #717ab3; font-weight: normal; font-style: italic;}"