--- media_player_box.py	2012-08-08 01:41:38.961610000 +0200
+++ /usr/lib/python2.7/dist-packages/quickly/widgets/media_player_box.py	2012-08-08 20:41:49.677843954 +0200
@@ -309,7 +309,7 @@
         if self.playbin.get_state(0)[1] == Gst.State.NULL:
             self.slider.set_range(0, 0)
         else:
-            GObject.idle_add(self._set_slider_range)
+            GObject.timeout_add(1000, self._set_slider_range)
 
     def _set_slider_range(self):
         dur = self.duration