Songbird do not start

Hi,
I've got a problem with Songbird and Ubuntu 9.10
After installing it and launched for the first time (when It worked) when I try to launch it again nothing appens.
From the terminal, when I try to start it I obtain these errors:

(songbird-bin:4211): GStreamer-WARNING **: Failed to load plugin '/usr/lib/gstreamer-0.10/libgstapp.so': /usr/lib/libgstapp-0.10.so.0: undefined symbol: gst_buffer_list_get_type

(songbird-bin:4211): GStreamer-WARNING **: Failed to load plugin '/usr/lib/gstreamer-0.10/libresindvd.so': /usr/lib/gstreamer-0.10/libresindvd.so: undefined symbol: gst_navigation_event_parse_command

(songbird-bin:4211): GStreamer-WARNING **: Failed to load plugin '/usr/lib/gstreamer-0.10/libgstlibvisual.so': /usr/lib/gstreamer-0.10/libgstlibvisual.so: undefined symbol: gst_adapter_prev_timestamp

(songbird-bin:4211): GStreamer-WARNING **: Failed to load plugin '/usr/lib/gstreamer-0.10/libgstdeinterlace.so': /usr/lib/gstreamer-0.10/libgstdeinterlace.so: undefined symbol: gst_video_format_parse_caps_interlaced

(songbird-bin:4211): GStreamer-WARNING **: Failed to load plugin '/usr/lib/gstreamer-0.10/libgstmpegdemux.so': /usr/lib/gstreamer-0.10/libgstmpegdemux.so: undefined symbol: _gst_debug_dump_mem

(songbird-bin:4211): GStreamer-WARNING **: Failed to load plugin '/usr/lib/gstreamer-0.10/libgstasfmux.so': /usr/lib/gstreamer-0.10/libgstasfmux.so: undefined symbol: gst_tag_list_add_value

(songbird-bin:4211): GStreamer-WARNING **: Failed to load plugin '/usr/lib/gstreamer-0.10/libgsthdvparse.so': /usr/lib/gstreamer-0.10/libgsthdvparse.so: undefined symbol: _gst_debug_dump_mem

(songbird-bin:4211): GStreamer-WARNING **: Failed to load plugin '/usr/lib/gstreamer-0.10/libgstdv.so': /usr/lib/gstreamer-0.10/libgstdv.so: undefined symbol: gst_tag_list_new_full

(songbird-bin:4211): GStreamer-WARNING **: Failed to load plugin '/usr/lib/gstreamer-0.10/libgstrawparse.so': /usr/lib/gstreamer-0.10/libgstrawparse.so: undefined symbol: gst_video_format_new_caps_interlaced

(songbird-bin:4211): GStreamer-WARNING **: Failed to load plugin '/usr/lib/gstreamer-0.10/libgstschro.so': /usr/lib/gstreamer-0.10/libgstschro.so: undefined symbol: gst_adapter_masked_scan_uint32
././songbird-bin: symbol lookup error: /usr/lib/python2.6/dist-packages/gst-0.10/gst/_gst.so: undefined symbol: gst_task_pool_get_type
Could not initialize GStreamer: Error re-scanning registry , child terminated by signal

I also tried to reinstall gstreamer ando other stuff but the problem remain.

Thanks for your help!
Lorenzo