diovani@paulo-diovani:~$ banshee
Argument cannot be null.
Parameter name: key
System.ArgumentNullException: Argument cannot be null.
Parameter name: key
  at System.Collections.Generic.Dictionary`2[System.String,NDesk.DBus.Bus].GetPr
ev (System.String , System.Int32& ) [0x00000] 
  at System.Collections.Generic.Dictionary`2[System.String,NDesk.DBus.Bus].GetSl
ot (System.String , System.Int32& ) [0x00000] 
  at System.Collections.Generic.Dictionary`2[System.String,NDesk.DBus.Bus].Conta
insKey (System.String ) [0x00000] 
  at NDesk.DBus.Bus.Open (System.String address) [0x00000] 
  at NDesk.DBus.Bus.get_Session () [0x00000] 
  at NDesk.DBus.BusG.Init () [0x00000] 
  at Banshee.BansheeEntry.Startup (System.String[] args) [0x00000] 
  at (wrapper delegate-invoke) System.MulticastDelegate:invoke_void_string[] (st
ring[])
  at Banshee.Gui.CleanRoomStartup.Startup (Banshee.Gui.StartupInvocationHandler 
startup, System.String[] args) [0x00000] 

Unhandled Exception: System.NullReferenceException: Object reference not set to 
an instance of an object
  at Banshee.Base.Branding.get_ApplicationIconName () [0x00000] 
diovani@paulo-diovani:~$