Steps to reproduce:
1. i type banshee-1in the terminal

Stack trace:
when i run banshee i had that problem 
[Info  16:36:51.675] Running Banshee 1.2.1


[Warn  16:36:53.360] Service `Nereid.PlayerInterface' not started: Could not load file or assembly 'ipod-sharp, Version=0.0.1.0, Culture=neutral, PublicKeyToken=536f152cecbf758a' or one of its dependencies. The system cannot find the file specified.
[Warn  16:36:53.378] Caught an exception - Could not load file or assembly 'ipod-sharp, Version=0.0.1.0, Culture=neutral, PublicKeyToken=536f152cecbf758a' or one of its dependencies. The system cannot find the file specified. (in `mscorlib')
  at (wrapper managed-to-native) System.AppDomain:LoadAssembly (string,System.Security.Policy.Evidence,bool)
  at System.AppDomain.Load (System.Reflection.AssemblyName assemblyRef, System.Security.Policy.Evidence assemblySecurity) [0x00000] 
  at (wrapper remoting-invoke-with-check) System.AppDomain:Load (System.Reflection.AssemblyName,System.Security.Policy.Evidence)
  at System.AppDomain.Load (System.Reflection.AssemblyName assemblyRef) [0x00000] 
  at (wrapper remoting-invoke-with-check) System.AppDomain:Load (System.Reflection.AssemblyName)
  at System.Reflection.Assembly.Load (System.Reflection.AssemblyName assemblyRef) [0x00000] 
  at GLib.GType.FindTypeInReferences (System.String type_name, System.Reflection.Assembly asm, System.Collections.Hashtable visited) [0x00000] 
  at GLib.GType.LookupType (IntPtr typeid) [0x00000] 
  at GLib.ObjectManager.GetTypeOrParent (IntPtr obj) [0x00000] 
  at GLib.ObjectManager.CreateObject (IntPtr raw) [0x00000] 
  at GLib.Object.GetObject (IntPtr o, Boolean owned_ref) [0x00000] 
  at GLib.Object.GetObject (IntPtr o) [0x00000] 
  at Gtk.Widget.get_Screen () [0x00000] 
  at Bacon.VolumeButton.BuildPopup (Double min, Double max, Double step) [0x00000] 
  at Bacon.VolumeButton..ctor (Double min, Double max, Double step, IconSize size) [0x00000] 
  at Bacon.VolumeButton..ctor () [0x00000] 
  at Banshee.Gui.Widgets.ConnectedVolumeButton..ctor () [0x00000] 
  at Nereid.PlayerInterface.BuildHeader () [0x00000] 
  at Nereid.PlayerInterface.BuildPrimaryLayout () [0x00000] 
  at Nereid.PlayerInterface.Initialize () [0x00000] 
  at Banshee.Gui.BaseClientWindow.InitializeWindow () [0x00000] 
  at Banshee.Gui.BaseClientWindow..ctor (System.String title) [0x00000] 
  at Nereid.PlayerInterface..ctor () [0x00000] 
  at (wrapper managed-to-native) System.Reflection.MonoCMethod:InternalInvoke (object,object[])
  at System.Reflection.MonoCMethod.Invoke (System.Object obj, BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) [0x00000] 
Exception in Gtk# callback delegate
  Note: Applications can use GLib.ExceptionManager.UnhandledException to handle the exception.
System.IO.FileNotFoundException: Could not load file or assembly 'ipod-sharp, Version=0.0.1.0, Culture=neutral, PublicKeyToken=536f152cecbf758a' or one of its dependencies. The system cannot find the file specified.
File name: 'ipod-sharp, Version=0.0.1.0, Culture=neutral, PublicKeyToken=536f152cecbf758a'
  at (wrapper managed-to-native) System.AppDomain:LoadAssembly (string,System.Security.Policy.Evidence,bool)
  at System.AppDomain.Load (System.Reflection.AssemblyName assemblyRef, System.Security.Policy.Evidence assemblySecurity) [0x00000] 
  at (wrapper remoting-invoke-with-check) System.AppDomain:Load (System.Reflection.AssemblyName,System.Security.Policy.Evidence)
  at System.AppDomain.Load (System.Reflection.AssemblyName assemblyRef) [0x00000] 
  at (wrapper remoting-invoke-with-check) System.AppDomain:Load (System.Reflection.AssemblyName)
  at System.Reflection.Assembly.Load (System.Reflection.AssemblyName assemblyRef) [0x00000] 
  at GLib.GType.FindTypeInReferences (System.String type_name, System.Reflection.Assembly asm, System.Collections.Hashtable visited) [0x00000] 
  at GLib.GType.LookupType (IntPtr typeid) [0x00000] 
  at GLib.ObjectManager.GetTypeOrParent (IntPtr obj) [0x00000] 
  at GLib.ObjectManager.CreateObject (IntPtr raw) [0x00000] 
  at GLib.Object.GetObject (IntPtr o, Boolean owned_ref) [0x00000] 
  at GLib.Object.GetObject (IntPtr o) [0x00000] 
  at Gtk.Window.get_Screen () [0x00000] 
  at X11NotificationArea.OnRealized () [0x00000] 
  at Gtk.Widget.realized_cb (IntPtr widget) [0x00000] 
   at GLib.ExceptionManager.RaiseUnhandledException(System.Exception e, Boolean is_terminal)
   at Gtk.Widget.realized_cb(IntPtr widget)
   at Gtk.Widget.realized_cb(IntPtr )
   at Gtk.Widget.gtk_widget_show_all(IntPtr )
   at Gtk.Widget.gtk_widget_show_all(IntPtr )
   at Gtk.Widget.ShowAll()
   at Banshee.NotificationArea.X11NotificationAreaBox..ctor()
   at Banshee.NotificationArea.NotificationAreaService.BuildNotificationArea()
   at Banshee.NotificationArea.NotificationAreaService.ServiceStartup()
   at Banshee.NotificationArea.NotificationAreaService.Banshee.ServiceStack.IExtensionService.Initialize()
   at Banshee.ServiceStack.ServiceManager.StartExtension(Mono.Addins.TypeExtensionNode node)
   at Banshee.ServiceStack.ServiceManager.Run()
   at Banshee.ServiceStack.Application.Run()
   at Banshee.Gui.GtkBaseClient.Initialize(Boolean registerCommonServices)
   at Banshee.Gui.GtkBaseClient..ctor(Boolean initializeDefault, System.String defaultIconName)
   at Banshee.Gui.GtkBaseClient..ctor()
   at Nereid.Client..ctor()
   at System.Reflection.MonoCMethod.InternalInvoke(System.Object , System.Object[] )
   at System.Reflection.MonoCMethod.InternalInvoke(System.Object , System.Object[] )
   at System.Reflection.MonoCMethod.Invoke(System.Object obj, BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture)
   at System.Reflection.MonoCMethod.Invoke(BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture)
   at System.Reflection.ConstructorInfo.Invoke(System.Object[] parameters)
   at System.Activator.CreateInstance(System.Type type, Boolean nonPublic)
   at System.Activator.CreateInstance(System.Type type)
   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)


Other information:
thanks for reading that bug