Original commit message from CVS:
2005-10-31  Andy Wingo  <wingo@pobox.com>

* Boo!

* gst/gstqueue.c (gst_queue_chain): Fix downstream leaky mode.

* gst/gstobject.c (gst_object_dispatch_properties_changed): No
need to serialize property notifications on GLib 2.8. GLib 2.6 has
the possibility of deadlocks here if code calling notify() or
set() has a lock that can be taken in another notify handler (ABBA
with class lock and e.g. python GIL state lock).