diff -r 61c384dda19e -r d35ad8111c5e src/widgets/Mediafragment.js
--- a/src/widgets/Mediafragment.js	Thu May 03 17:52:52 2012 +0200
+++ b/src/widgets/Mediafragment.js	Fri May 04 16:56:41 2012 +0200
@@ -42,8 +42,9 @@
 }
 
 IriSP.Widgets.Mediafragment.prototype.setHashToTime = function(_time) {
-    _time = (typeof _time !== "undefined" ? _time : this.player.popcorn.currentTime() );
-    this.setHash( '#t=' + _time );
+    if (_time !== NaN) {
+        this.setHash( '#t=' + this.player.popcorn.currentTime() );
+    }
 }
 
 IriSP.Widgets.Mediafragment.prototype.setHash = function(_hash) {