Blam fails to start

Trying to run blam 1.8.0-0ubuntu1 results in the following:

Unhandled Exception: System.DllNotFoundException: gdk-x11-2.0
in (wrapper managed-to-native) Egg.TrayIcon:gdk_x11_display_get_xdisplay (intptr)
in <0x00049> Egg.TrayIcon:OnRealized ()
in <0x0003b> Gtk.Widget:realized_cb (IntPtr widget)
in (wrapper native-to-m...

Trying to run blam 1.8.0-0ubuntu1 results in the following:

Unhandled Exception: System.DllNotFoundException: gdk-x11-2.0
in (wrapper managed-to-native) Egg.TrayIcon:gdk_x11_display_get_xdisplay (intptr)
in <0x00049> Egg.TrayIcon:OnRealized ()
in <0x0003b> Gtk.Widget:realized_cb (IntPtr widget)
in (wrapper native-to-managed) Gtk.Widget:realized_cb (intptr)
in <0x00000> <unknown method>
in (wrapper managed-to-native) Gtk.Widget:gtk_widget_show_all (intptr)
in <0x00017> Gtk.Widget:ShowAll ()
in <0x0000d> Imendio.Blam.TrayIcon:Show ()
in <0x0007c> Imendio.Blam.Application:UpdateTotalNumberOfUnread ()
in <0x003b2> Imendio.Blam.Application:PrepareGUI ()
in <0x002e6> Imendio.Blam.Application:.ctor (System.String[] args, System.Object[] props)
in <0x0002c> Imendio.Blam.Application:Main (System.String[] args)