diff -r ec10aa4a09b0 -r e3187d58ca5e gst_plugins_base/gst/playback/gstplaysink.c
--- a/gst_plugins_base/gst/playback/gstplaysink.c	Fri Sep 17 08:31:31 2010 +0300
+++ b/gst_plugins_base/gst/playback/gstplaysink.c	Mon Oct 04 00:35:59 2010 +0300
@@ -780,6 +780,8 @@
   GstElement *result = NULL;
   GstIterator *it;
 
+  if (!obj)
+      return result;
   if (g_object_class_find_property (G_OBJECT_GET_CLASS (obj), name)) {
     result = obj;
   } else if (GST_IS_BIN (obj)) {