Code:
Gizmo@linux-lnon:/usr/lib/gstreamer-0.10> rhythmbox --gst-fatal-warnings

GStreamer-WARNING **: Failed to load plugin '/usr/lib/gstreamer-0.10/libgstcacasink.so': libcucul.so.0: cannot open shared object file: No such file or directory   
aborting...                                                                       
Error re-scanning registry , child terminated by signal                           
Run 'rhythmbox --help' to see a full list of available command line options.      
Gizmo@linux-lnon:/usr/lib/gstreamer-0.10> rhythmbox --gst-debug-help

(rhythmbox:24444): GStreamer-WARNING **: Failed to load plugin '/usr/lib/gstreamer-0.10/libgstcacasink.so': libcucul.so.0: cannot open shared object file: No such file or directory                                                                  

(rhythmbox:24443): GStreamer-CRITICAL **: gst_caps_ref: assertion `GST_CAPS_REFCOUNT_VALUE (caps) > 0' failed                                                       

(rhythmbox:24443): GStreamer-CRITICAL **: gst_caps_unref: assertion `GST_CAPS_REFCOUNT_VALUE (caps) > 0' failed                                                     

(rhythmbox:24443): GStreamer-CRITICAL **: gst_caps_ref: assertion `GST_CAPS_REFCOUNT_VALUE (caps) > 0' failed                                                       

(rhythmbox:24443): GStreamer-CRITICAL **: gst_caps_unref: assertion `GST_CAPS_REFCOUNT_VALUE (caps) > 0' failed                                                     

(rhythmbox:24443): GStreamer-CRITICAL **: gst_caps_ref: assertion `GST_CAPS_REFCOUNT_VALUE (caps) > 0' failed                                                       

(rhythmbox:24443): GStreamer-CRITICAL **: gst_caps_unref: assertion `GST_CAPS_REFCOUNT_VALUE (caps) > 0' failed                                                     

(rhythmbox:24443): GStreamer-CRITICAL **: gst_caps_ref: assertion `GST_CAPS_REFCOUNT_VALUE (caps) > 0' failed                                                       

(rhythmbox:24443): GStreamer-CRITICAL **: gst_caps_unref: assertion `GST_CAPS_REFCOUNT_VALUE (caps) > 0' failed                                                     

Gizmo@linux-lnon:/usr/lib/gstreamer-0.10>
Anyone got any Idear, how to fix it.