diff -r bcf0c2bdcb8e -r ae16691d183d src/js/widgets/segmentsWidget.js
--- a/src/js/widgets/segmentsWidget.js	Mon Mar 05 18:11:58 2012 +0100
+++ b/src/js/widgets/segmentsWidget.js	Tue Mar 06 13:26:51 2012 +0100
@@ -50,7 +50,7 @@
   if (typeof(view_type) === "undefined") {
     view_type = this._serializer.getNonTweetIds()[0];  
   }
-  this.positionMarker = this.selector.children(":first");
+  this.positionMarker = this.selector.find(".Ldt-SegmentPositionMarker");
   
   this._Popcorn.listen("timeupdate", IriSP.wrap(this, this.positionUpdater));