Bug forwarded to upstream from: https://bugs.launchpad.net/ubuntu/+source/tomboy/+bug/391124

Binary package hint: tomboy

starting tomboy freshly on an ARM board gets me working application windows, lets me search, create and link notes, but as soon as i click the notification icon the app crashes:

ogra@babbage2:~$ tomboy
[DEBUG]: NoteManager created with note path "/home/ogra/.tomboy".
[INFO]: Initializing Mono.Addins

Unhandled Exception: System.InvalidOperationException: Could not read add-in description
  at Mono.Addins.Addin.get_Description () [0x00000]
  at Mono.Addins.AddinSessionService.CheckHostAssembly (System.Reflection.Assembly asm) [0x00000]
  at Mono.Addins.AddinSessionService.ActivateRoots () [0x00000]
  at Mono.Addins.AddinSessionService.Initialize () [0x00000]
  at Mono.Addins.AddinManager.Initialize (System.String configDir) [0x00000]
  at Tomboy.AddinManager.InitializeMonoAddins () [0x00000]
  at Tomboy.AddinManager..ctor (System.String tomboy_conf_dir) [0x00000]
  at Tomboy.NoteManager.CreateAddinManager () [0x00000]
  at Tomboy.NoteManager..ctor (System.String directory, System.String backup_directory) [0x00000]
  at Tomboy.NoteManager..ctor (System.String directory) [0x00000]
  at Tomboy.Tomboy.Main (System.String[] args) [0x00000]
ogra@babbage2:~$ tomboy
[DEBUG]: NoteManager created with note path "/home/ogra/.tomboy".
[INFO]: Initializing Mono.Addins
[DEBUG]: AddinManager.OnAddinLoaded: Tomboy.Tomboy
[DEBUG]: Name: Tomboy.Tomboy,0.10
[DEBUG]: Description:
[DEBUG]: Namespace: Tomboy
[DEBUG]: Enabled: True
[DEBUG]: File: /usr/lib/tomboy/Tomboy.exe
[DEBUG]: AddinManager.OnAddinLoaded: Tomboy.ExportToHtmlAddin
[DEBUG]: Name: Export to HTML
[DEBUG]: Description: Exports individual notes to HTML.
[DEBUG]: Namespace: Tomboy
[DEBUG]: Enabled: True
[DEBUG]: File: /usr/lib/tomboy/addins/ExportToHtml.dll
[DEBUG]: AddinManager.OnAddinLoaded: Tomboy.PrintNotesAddin
[DEBUG]: Name: Printing Support
[DEBUG]: Description: Allows you to print a note.
[DEBUG]: Namespace: Tomboy
[DEBUG]: Enabled: True
[DEBUG]: File: /usr/lib/tomboy/addins/PrintNotes.dll
[DEBUG]: AddinManager.OnAddinLoaded: Tomboy.BacklinksAddin
[DEBUG]: Name: Backlinks
[DEBUG]: Description: See which notes link to the one you're currently viewing.
[DEBUG]: Namespace: Tomboy
[DEBUG]: Enabled: True
[DEBUG]: File: /usr/lib/tomboy/addins/Backlinks.dll
[DEBUG]: AddinManager.OnAddinLoaded: Tomboy.EvolutionAddin
[DEBUG]: Name: Evolution Mail Integration
[DEBUG]: Description: Allows you to drag an email from Evolution into a tomboy note. The message subject is added as a link in the note.
[DEBUG]: Namespace: Tomboy
[DEBUG]: Enabled: True
[DEBUG]: File: /usr/lib/tomboy/addins/Evolution.dll
[DEBUG]: AddinManager.OnAddinLoaded: Tomboy.FixedWidthAddin
[DEBUG]: Name: Fixed Width
[DEBUG]: Description: Adds fixed-width font style.
[DEBUG]: Namespace: Tomboy
[DEBUG]: Enabled: True
[DEBUG]: File: /usr/lib/tomboy/addins/FixedWidth.dll
[DEBUG]: AddinManager.OnAddinLoaded: Tomboy.StickyNoteImportAddin
[DEBUG]: Name: Sticky Notes Importer
[DEBUG]: Description: Import your notes from the Sticky Notes applet.
[DEBUG]: Namespace: Tomboy
[DEBUG]: Enabled: True
[DEBUG]: File: /usr/lib/tomboy/addins/StickyNoteImport.dll
[DEBUG]: StickyNoteImporter: Sticky Notes XML file does not exist or is invalid!
[DEBUG]: Creating Buffer for 'Start Here'...
[DEBUG]: Matching Note title 'Using Links in Tomboy' at 386-407...
[DEBUG]: Matching Note title 'Using Links in Tomboy' at 439-460...
[DEBUG]: Start Here tags:
[DEBUG]: AddinManager.OnAddinLoaded: Tomboy.WebDavSyncServiceAddin
[DEBUG]: Name: WebDav Sync Service Add-in
[DEBUG]: Description: Synchronize Tomboy Notes to a WebDav URL
[DEBUG]: Namespace: Tomboy
[DEBUG]: Enabled: True
[DEBUG]: File: /usr/lib/tomboy/addins/WebDavSyncService.dll
[DEBUG]: AddinManager.OnAddinLoaded: Tomboy.FileSystemSyncServiceAddin
[DEBUG]: Name: Local Directory Sync Service Add-in
[DEBUG]: Description: Synchronize Tomboy Notes to a local file system path
[DEBUG]: Namespace: Tomboy
[DEBUG]: Enabled: True
[DEBUG]: File: /usr/lib/tomboy/addins/FileSystemSyncService.dll
[DEBUG]: Unable to locate 'gnomesu' in your PATH
[DEBUG]: Using '/usr/bin/gksu' as GUI 'su' tool
[DEBUG]: Successfully found all system tools
[DEBUG]: Unable to locate 'wdfs' in your PATH
[DEBUG]: Tomboy remote control disabled (DBus exception): Unable to open the session message bus.
[DEBUG]: EnableDisable Called: enabling... True
[DEBUG]: Binding key '<Alt>F12' for '/apps/tomboy/global_keybindings/show_note_menu'
[DEBUG]: Binding key '<Alt>F11' for '/apps/tomboy/global_keybindings/open_start_here'
[DEBUG]: Saving 'Start Here'...
[DEBUG]: Saving 'Using Links in Tomboy'...
[DEBUG]: Saving 'Start Here'...
Exception in Gtk# callback delegate
  Note: Applications can use GLib.ExceptionManager.UnhandledException to handle the exception.
System.NullReferenceException: Object reference not set to an instance of an object
at (wrapper native-to-managed) GtkSharp.MenuPositionFuncWrapper.NativeCallback (intptr,int&,int&,byte,intptr) <0x00060>
at Gtk.Menu.Popup (Gtk.Widget,Gtk.Widget,Gtk.MenuPositionFunc,uint,uint) <0x000d0>
at Tomboy.GuiUtils.PopupMenu (Gtk.Menu,Gdk.EventButton,Gtk.MenuPositionFunc) <0x000f3>
at Tomboy.TomboyTrayIcon.OnPopupMenu (uint,uint) <0x0008f>
at Gtk.StatusIcon.popupmenu_cb (intptr,uint,uint) <0x00087>

   at GLib.ExceptionManager.RaiseUnhandledException(System.Exception e, Boolean is_terminal)
   at Gtk.StatusIcon.popupmenu_cb(IntPtr status_icon, UInt32 button, UInt32 activate_time)
   at Gtk.Application.gtk_main()
   at Gtk.Application.Run()
   at Gnome.Program.Run()
   at Tomboy.GnomeApplication.StartMainLoop()
   at Tomboy.Application.StartMainLoop()
   at Tomboy.Tomboy.StartTrayIcon()
   at Tomboy.Tomboy.Main(System.String[] args)

Version info:
ogra@babbage2:~$ dpkg -l tomboy|grep ii
ii tomboy 0.15.6-0ubuntu1