diff -r 1139ce4af5f5 -r 94fea76c883e src/js/widgets/traceWidget.js
--- a/src/js/widgets/traceWidget.js	Fri May 11 16:04:15 2012 +0200
+++ b/src/js/widgets/traceWidget.js	Fri May 11 16:04:53 2012 +0200
@@ -34,7 +34,6 @@
     }));
     
     this.tracer = IriSP.TraceManager(IriSP.jQuery).init_trace("test", this._config);
-    this.tracer.set_default_subject("default_subject");
     this.tracer.trace("StartTracing", { "hello": "world" });
     
 }