+++ This bug was initially created as a clone of Bug #447734 +++

Please describe the problem:
In sound preference dialog,no sound plays when click "play"

Steps to reproduce:
1.Launch 'Preferences'->'Sound'.
2."Device"->"Sound Event",Change "ESD" from "default",click "Test"
3."Sounds",Check the"'Enable software sound mixing" checkbox and "Play system sounds"checkbox.
4.Navigate to "System Sounds" list,select one system event, focus "Play" button and action it.


Actual results:
After#2:There is a warning as follows
audiotestsrc wave=sine freq=512 ! audioconvert ! audioresample ! gconfaudiosink: Could not establish connection to sound server
After#4:No sound plays

Expected results:
All the sounds play successfully.

Does this happen every time?
Log out and Log in again, all the sounds play well.

Other information:
-----------------------------------
Here is my report:

Fedora Core 8 x86_64, AMD AMII 3500+ AMD CPU, 2GB RAM. Applied 8 updates (including one for GStreamer) on May 29, 2008. After that, my system has no sound. I verified that the soundcard was detected and heard the test sound. Like the posting above, I went to System -> Preferences -> Hardware -> Sound.

-----
Sound Events: 
 Sound playback: Autodetect -> I click 'Test' and got error:
-
audiotestsrc wave=sine freq=512 ! audioconvert ! audioresample ! gconfaudiosink: Internal GStreamer error: state change failed.  Please file a bug at http://bugzilla.gnome.org/enter_bug.cgi?product=GStreamer.
-

Music and Movies: 
 Sound playback: Autodetect -> I click 'Test' and got error:
-
audiotestsrc wave=sine freq=512 ! audioconvert ! audioresample ! gconfaudiosink profile=music: Internal GStreamer error: state change failed.  Please file a bug at http://bugzilla.gnome.org/enter_bug.cgi?product=GStreamer.
-

Audio Conferencing: 
 Sound playback: Autodetect -> I click 'Test' and got error:
-
audiotestsrc wave=sine freq=512 ! audioconvert ! audioresample ! gconfaudiosink profile=chat: Internal GStreamer error: state change failed.  Please file a bug at http://bugzilla.gnome.org/enter_bug.cgi?product=GStreamer.
-
 Sound capture: ALSA -> I click 'Test' and got error:
-
gconfaudiosrc ! audioconvert ! audioresample ! gconfaudiosink profile=chat: Internal GStreamer error: state change failed.  Please file a bug at http://bugzilla.gnome.org/enter_bug.cgi?product=GStreamer.
-

Default Mixer Tracks: 
 Device: HDA VIA VT82xx (Alsa mixer)
-----

I don't know what GStreamer update I applied (if someone tells me where to find the logfile, I'll post that info too), but it caused my system to stop playing sounds. This is my first ever bugzilla report so I hope I covered everything, if not, please ask for specifics and how I can locate the information desired.

If this helps, here you go:
[matt@localhost ~]$ yum list gstreamer*
Installed Packages
gstreamer.x86_64                         0.10.15-1.fc8          installed       
gstreamer.i386                           0.10.15-1.fc8          installed       
gstreamer-plugins-base.x86_64            0.10.15-3.fc8          installed       
gstreamer-plugins-good.x86_64            0.10.6-7.fc8           installed       
gstreamer-plugins-pulse.x86_64           0.9.5-0.4.svn20070924. installed       
gstreamer-python.x86_64                  0.10.8-2.fc8           installed       
gstreamer-tools.x86_64                   0.10.15-1.fc8          installed       
Available Packages
gstreamer-devel.i386                     0.10.15-1.fc8          updates         
gstreamer-devel.x86_64                   0.10.15-1.fc8          updates         
gstreamer-plugins-base.i386              0.10.15-3.fc8          updates         
gstreamer-plugins-base-devel.x86_64      0.10.15-3.fc8          updates         
gstreamer-plugins-base-devel.i386        0.10.15-3.fc8          updates         
gstreamer-plugins-farsight.x86_64        0.12.5-1.fc8           fedora          
gstreamer-plugins-good-devel.x86_64      0.10.6-7.fc8           updates         
gstreamer-plugins-good-devel.i386        0.10.6-7.fc8           updates         
gstreamer-plugins-schroedinger.x86_64    0.9.0-1.fc8            updates