diff -r 7e5174fe9816 -r 5b7d7ab6baff web/player_embed.php
--- a/web/player_embed.php	Mon May 21 18:53:02 2012 +0200
+++ b/web/player_embed.php	Tue May 22 16:47:35 2012 +0200
@@ -61,7 +61,11 @@
                 { type: "Arrow" },
                 { type: "Annotation" },
                 { type: "Tweet" },
-                { type: "Mediafragment"}
+                { type: "Mediafragment"},
+                {
+                    type: "Trace",
+                    default_subject: "PolemicTweet-player"
+                }
             ]
         },
         player:{