Tomboy - System.DllNotFoundException: libappindicator.so.0

Binary package hint: tomboy

Unhandled Exception: System.TypeInitializationException: An exception was thrown by the type initializer for AppIndicator.ApplicationIndicator ---> System.DllNotFoundException: libappindicator.so.0
  at (wrapper managed-to-native) AppIndicator.ApplicationIndicator:app_indicator_get_type ()
  at AppIndicator.ApplicationIndicator.get_GType () [0x00000] in <filename unknown>:0
  at GtkSharp.AppindicatorSharp.ObjectManager.Initialize () [0x00000] in <filename unknown>:0
  at AppIndicator.ApplicationIndicator..cctor () [0x00000] in <filename unknown>:0
  --- End of inner exception stack trace ---
  at Tomboy.TomboyIndicatorTray..ctor (Tomboy.NoteManager manager) [0x00000] in <filename unknown>:0
  at Tomboy.Tomboy.StartTrayIcon () [0x00000] in <filename unknown>:0
  at Tomboy.Tomboy.Main (System.String[] args) [0x00000] in <filename unknown>:0

ProblemType: Bug
DistroRelease: Ubuntu 10.10
Package: tomboy 1.3.4-0ubuntu1
ProcVersionSignature: Ubuntu 2.6.35-22.33-generic 2.6.35.4
Uname: Linux 2.6.35-22-generic i686
NonfreeKernelModules: nvidia
Architecture: i386
Date: Thu Sep 23 09:53:32 2010
ProcEnviron:
 PATH=(custom, no user)
 LANG=fr_FR.UTF-8
 SHELL=/bin/bash
SourcePackage: tomboy