Steps to reproduce:
1. Have banshee playing a song
2. issue command 'banshee-1 --stop' in any way (i.e. via keyboard shortcut or terminal.)
3. Right click on banshee tray icon and voila! crash.



Stack trace:
Banshee Log:
[Info  17:58:11.635] Running Banshee 1.2.1
[Info  17:58:14.277] All services are started 2.380794s
[Info  17:58:17.350] nereid Client Started
[Warn  17:58:17.635] Caught an exception - org.freedesktop.Hal.NoSuchProperty: No property volume.is_mounted on device with id /org/freedesktop/Hal/devices/platform_floppy_0_storage_platform_floppy (in `NDesk.DBus.Proxies')
  at IDeviceProxy.GetPropertyBoolean (System.String ) [0x00000] 
  at Hal.Device.GetPropertyBoolean (System.String key) [0x00000] 
  at Banshee.HalBackend.Volume.get_IsMounted () [0x00000] 
  at Banshee.HalBackend.Volume.CheckVolumeMounted (Banshee.HalBackend.Volume volume) [0x00000] 
  at Banshee.HalBackend.Volume.Resolve (Banshee.HalBackend.BlockDevice parent, Hal.Manager manager, Hal.Device device) [0x00000] 
[Warn  17:58:18.085] Caught an exception - org.freedesktop.Hal.NoSuchProperty: No property volume.is_mounted on device with id /org/freedesktop/Hal/devices/platform_floppy_0_storage_platform_floppy (in `NDesk.DBus.Proxies')
  at IDeviceProxy.GetPropertyBoolean (System.String ) [0x00000] 
  at Hal.Device.GetPropertyBoolean (System.String key) [0x00000] 
  at Banshee.HalBackend.Volume.get_IsMounted () [0x00000] 
  at Banshee.HalBackend.Volume.CheckVolumeMounted (Banshee.HalBackend.Volume volume) [0x00000] 
  at Banshee.HalBackend.Volume.Resolve (Banshee.HalBackend.BlockDevice parent, Hal.Manager manager, Hal.Device device) [0x00000] 
[Warn  17:58:18.383] Caught an exception - org.freedesktop.Hal.NoSuchProperty: No property volume.is_mounted on device with id /org/freedesktop/Hal/devices/platform_floppy_0_storage_platform_floppy (in `NDesk.DBus.Proxies')
  at IDeviceProxy.GetPropertyBoolean (System.String ) [0x00000] 
  at Hal.Device.GetPropertyBoolean (System.String key) [0x00000] 
  at Banshee.HalBackend.Volume.get_IsMounted () [0x00000] 
  at Banshee.HalBackend.Volume.CheckVolumeMounted (Banshee.HalBackend.Volume volume) [0x00000] 
  at Banshee.HalBackend.Volume.Resolve (Banshee.HalBackend.BlockDevice parent, Hal.Manager manager, Hal.Device device) [0x00000] 
[Warn  18:01:23.643] Called Reload on Banshee.Collection.Database.DatabaseTrackListModel for source New Playlist but cache is null;  Did you forget to call AfterInitialized () in your DatabaseSource ctor?
Exception in Gtk# callback delegate
  Note: Applications can use GLib.ExceptionManager.UnhandledException to handle the exception.
System.NullReferenceException: Object reference not set to an instance of an object
  at Banshee.NotificationArea.NotificationAreaService.OnNotificationAreaPopupMenuEvent (System.Object o, Gtk.PopupMenuArgs args) [0x00000] 
  at Banshee.NotificationArea.X11NotificationAreaBox.OnPopupMenuEvent () [0x00000] 
  at Banshee.NotificationArea.X11NotificationAreaBox.OnButtonPressEvent (System.Object o, Gtk.ButtonPressEventArgs args) [0x00000] 
  at Gtk.Widget.ButtonPressEventSignalCallback (IntPtr arg0, IntPtr arg1, IntPtr gch) [0x00000] 
   at GLib.ExceptionManager.RaiseUnhandledException(System.Exception e, Boolean is_terminal)
   at Gtk.Widget.ButtonPressEventSignalCallback(IntPtr arg0, IntPtr arg1, IntPtr gch)
   at Gtk.Widget.ButtonPressEventSignalCallback(IntPtr , IntPtr , IntPtr )
   at Gtk.Application.gtk_main()
   at 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.StartupInvocationHandler startup)
   at Banshee.Gui.GtkBaseClient.Entry()
   at Nereid.Client.Main(System.String[] args)
[Warn  18:03:22.845] Caught an exception - interrupted (in `System')
  at System.Net.Sockets.Socket.Accept () [0x00000] 
  at Banshee.Daap.DaapProxyWebServer.ServerLoop () [0x00000]

dmesg output:
[104277.840196] mono[16681]: segfault at d091fa2c ip b7f80815 sp b7447020 error 5 in libglib-2.0.so.0.1600.4[b7f56000+b0000]
[107079.473114] mono[17012]: segfault at 26a60744 ip b7f2c815 sp b73f3020 error 4 in libglib-2.0.so.0.1600.4[b7f02000+b0000]
[132648.956893] mono[17732]: segfault at d17111c4 ip b7e3b815 sp b7302020 error 5 in libglib-2.0.so.0.1600.4[b7e11000+b0000]

Other information:
I am using 1.2.1 on ubuntu 8.04 from the ppa.launchpad.net repo's.
Issue is exhibited on both my laptop and desktop machines. 
Laptop is running 2.6.26.2 kernel compiled from source, Desktop is running 2.6.26.3 kernel compiled from source.  Both machine's are using the latest source nVidia drivers.
dmesg outputs one of those lines for each crash.