An unhandled exception was thrown: Object reference not set to an instance of an object

at Banshee.Plugins.Lyrics.LyricsPlugin.OnPlayerEngineEventChanged (Banshee.MediaEngine.PlayerEventArgs)
at (wrapper delegate-invoke) Banshee.MediaEngine.PlayerEventHandler.invoke_void__this___PlayerEventArgs (Banshee.MediaEngine.PlayerEventArgs)
at (wrapper delegate-invoke) Banshee.MediaEngine.PlayerEventHandler.invoke_void__this___PlayerEventArgs (Banshee.MediaEngine.PlayerEventArgs)
at Banshee.MediaEngine.PlayerEngine.RaiseEventChanged (Banshee.MediaEngine.PlayerEventArgs)
at Banshee.MediaEngine.PlayerEngine.OnEventChanged (Banshee.MediaEngine.PlayerEventArgs)
at Banshee.MediaEngine.PlayerEngine.OnEventChanged (Banshee.MediaEngine.PlayerEvent)
at Banshee.GStreamer.PlayerEngine.OnStateChange (intptr,Banshee.GStreamer.GstState,Banshee.GStreamer.GstState,Banshee.GStreamer.GstState)
at (wrapper native-to-managed) Banshee.GStreamer.PlayerEngine.OnStateChange (intptr,Banshee.GStreamer.GstState,Banshee.GStreamer.GstState,Banshee.GStreamer.GstState)
at (wrapper managed-to-native) Gtk.Application.gtk_main ()
at Gtk.Application.Run ()
at Banshee.Gui.GtkBaseClient.Run ()
at Banshee.Gui.GtkBaseClient.Startup ()
at Hyena.Gui.CleanRoomStartup.Startup (Hyena.Gui.CleanRoomStartup/StartupInvocationHandler)

.NET Version: 2.0.50727.42
OS Version: Unix 2.6.28.13

Assembly Version Information:

System.Configuration (2.0.0.0)
avahi-sharp (1.0.0.0)
Mono.Zeroconf.Providers.Avahi (2.0.0.76)
Mono.Zeroconf (2.0.0.76)
Mtp (1.4.0.0)
Banshee.Dap.MassStorage (1.4.0.0)
Banshee.Dap.Mtp (1.4.0.0)
taglib-sharp (2.0.3.2)
Mono.Media (1.4.0.0)
Banshee.InternetRadio (1.4.0.0)
Banshee.FileSystemQueue (1.4.0.0)
Banshee.PlayQueue (1.4.0.0)
Banshee.Lyrics (0.0.0.0)
Banshee.CoverArt (1.4.0.0)
Lastfm (1.4.0.0)
Banshee.Lastfm (1.4.0.0)
Migo (1.4.0.0)
Banshee.Podcasting (1.4.0.0)
notify-sharp (0.4.0.0)
Banshee.NotificationArea (1.4.0.0)
Banshee.AudioCd (1.4.0.0)
Banshee.Bookmarks (1.4.0.0)
Banshee.MultimediaKeys (1.4.0.0)
Banshee.Daap (1.4.0.0)
Banshee.Dap (1.4.0.0)
pango-sharp (2.12.0.0)
Banshee.Widgets (1.4.0.0)
Banshee.Hal (1.4.0.0)
Banshee.Unix (1.4.0.0)
Banshee.GStreamer (1.4.0.0)
gconf-sharp (2.24.0.0)
Banshee.Gnome (1.4.0.0)
Banshee.NowPlaying (1.4.0.0)
System.Transactions (2.0.0.0)
NDesk.DBus.GLib (1.0.0.0)
Mono.Cairo (2.0.0.0)
System.Data (2.0.0.0)
Mono.Data.SqliteClient (2.0.0.0)
gdk-sharp (2.12.0.0)
Mono.Addins (0.4.0.0)
atk-sharp (2.12.0.0)
Hyena.Gui (1.4.0.0)
gtk-sharp (2.12.0.0)
Banshee.ThickClient (1.4.0.0)
Nereid (1.4.0.0)
System.Xml (2.0.0.0)
NDesk.DBus.Proxies (0.0.0.0)
Mono.Posix (2.0.0.0)
Banshee.Core (1.4.0.0)
System (2.0.0.0)
Hyena (1.4.0.0)
NDesk.DBus (1.0.0.0)
glib-sharp (2.12.0.0)
Banshee.Services (1.4.0.0)
Banshee (1.4.0.0)
mscorlib (2.0.0.0)

Platform Information: Linux 2.6.28-13-generic i686 unknown GNU/Linux

Disribution Information:

[/etc/lsb-release]
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=9.04
DISTRIB_CODENAME=jaunty
DISTRIB_DESCRIPTION=”Ubuntu 9.04″

[/etc/debian_version]
5.0

che fare?

Saluti,
Christian