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].GetPrev (System.String , System.Int32& ) [0x00000] 
  at System.Collections.Generic.Dictionary`2[System.String,NDesk.DBus.Bus].GetSlot (System.String , System.Int32& ) [0x00000] 
  at System.Collections.Generic.Dictionary`2[System.String,NDesk.DBus.Bus].ContainsKey (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[] (string[])
  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] 
  at Banshee.Base.IconThemeUtils.SetWindowIcon (Gtk.Window window) [0x00000] 
  at Banshee.Gui.Dialogs.ExceptionDialog..ctor (System.Exception e) [0x00000] 
  at Banshee.Gui.CleanRoomStartup.Startup (Banshee.Gui.StartupInvocationHandler startup, System.String[] args) [0x00000] 
  at Banshee.BansheeEntry.Main (System.String[] args) [0x00000]