Собственно сабж.
[PYLK]~% giver
[Debug]: PhotoService static constructor called
[Debug]: New GiverService was created
[Debug]: We have the port : 57522
[Debug]: About to create the Avahi client
[Debug]: Adding Avahi Service _giver._tcp
[Debug]: Avahi Service _giver._tcp is added
[Debug]: GiverService:OnEntryGroupStateChanged was called state: Registering
Exception in Gtk# callback delegate
Note: Applications can use GLib.ExceptionManager.UnhandledException to handle the exception.
System.DllNotFoundException: libX11.so
at (wrapper managed-to-native) Egg.TrayIcon:XInternAtom (intptr,string,bool)
at Egg.TrayIcon.OnRealized () [0x00000] in <filename unknown>:0
at Gtk.Widget.realized_cb (IntPtr widget) [0x00000] in <filename unknown>:0
at GLib.ExceptionManager.RaiseUnhandledException(System.Exception e, Boolean is_terminal)
at Gtk.Widget.realized_cb(IntPtr widget)
at Gtk.Widget.gtk_widget_show_all(IntPtr )
at Gtk.Widget.ShowAll()
at Giver.Application.SetupTrayIcon()
at Giver.Application.InitializeIdle()
at GLib.Idle+IdleProxy.Handler()
at Gtk.Application.gtk_main()
at Gtk.Application.Run()
at Gnome.Program.Run()
at Giver.Application.StartMainLoop()
at Giver.Application.Main(System.String[] args)
[PYLK]~% uname -a
Linux alpi-netbook 2.6.38-15-generic-pae #66-Ubuntu SMP Tue Aug 14 17:45:09 UTC 2012 i686 i686 i386 GNU/Linux