tomboy wont start

Binary package hint: tomboy

Tomboy wont start (it crashes), the Ubuntu One sync is enabled.

Here is the output of tomboy --debug:
marcos@Nero:~$ tomboy --debug
** Running Mono with --debug **
[DEBUG 01:25:55.365] NoteManager created with note path "/home/marcos/.local/share/tomboy".
[INFO 01:25:55.904] Initializing Mono.Addins
[DEBUG 01:25:56.022] AddinManager.OnAddinLoaded: Tomboy.Tomboy
[DEBUG 01:25:56.024] Name: Tomboy.Tomboy,0.10
[DEBUG 01:25:56.024] Description:
[DEBUG 01:25:56.025] Namespace: Tomboy
[DEBUG 01:25:56.025] Enabled: True
[DEBUG 01:25:56.025] File: /usr/lib/tomboy/Tomboy.exe
[DEBUG 01:25:57.358] AddinManager.OnAddinLoaded: Tomboy.WebSyncServiceAddin
[DEBUG 01:25:57.359] Name: Web Sync Service Add-in
[DEBUG 01:25:57.359] Description: Synchronize Tomboy Notes with Tomboy Online and other compatible web services
[DEBUG 01:25:57.359] Namespace: Tomboy
[DEBUG 01:25:57.359] Enabled: True
[DEBUG 01:25:57.359] File: /usr/lib/tomboy/addins/WebSyncServiceAddin.dll
[DEBUG 01:25:57.360] AddinManager.OnAddinLoaded: Tomboy.WebDavSyncServiceAddin
[DEBUG 01:25:57.361] Name: WebDav Sync Service Add-in
[DEBUG 01:25:57.361] Description: Synchronize Tomboy Notes to a WebDav URL
[DEBUG 01:25:57.361] Namespace: Tomboy
[DEBUG 01:25:57.361] Enabled: True
[DEBUG 01:25:57.361] File: /usr/lib/tomboy/addins/WebDavSyncService.dll
[DEBUG 01:25:57.365] Unable to locate 'gnomesu' in your PATH
[DEBUG 01:25:57.365] Using '/usr/bin/gksu' as GUI 'su' tool
[DEBUG 01:25:57.365] Successfully found all system tools
[DEBUG 01:25:57.366] Unable to locate 'wdfs' in your PATH
[DEBUG 01:25:57.366] AddinManager.OnAddinLoaded: Tomboy.FileSystemSyncServiceAddin
[DEBUG 01:25:57.367] Name: Local Directory Sync Service Add-in
[DEBUG 01:25:57.367] Description: Synchronize Tomboy Notes to a local file system path
[DEBUG 01:25:57.367] Namespace: Tomboy
[DEBUG 01:25:57.367] Enabled: True
[DEBUG 01:25:57.367] File: /usr/lib/tomboy/addins/FileSystemSyncService.dll
Exception in Gtk# callback delegate
  Note: Applications can use GLib.ExceptionManager.UnhandledException to handle the exception.
System.IO.IOException: Invalid handle to path "/home/marcos/.local/share/tomboy/dad8b4d4-752c-4309-8b5a-ed69aa13383f.note"
  at System.IO.FileStream..ctor (System.String path, FileMode mode, FileAccess access, FileShare share, Int32 bufferSize, Boolean anonymous, FileOptions options) [0x00000] in <filename unknown>:0
  at System.IO.FileStream..ctor (System.String path, FileMode mode, FileAccess access, FileShare share) [0x00000] in <filename unknown>:0
  at (wrapper remoting-invoke-with-check) System.IO.FileStream:.ctor (string,System.IO.FileMode,System.IO.FileAccess,System.IO.FileShare)
  at System.IO.File.OpenRead (System.String path) [0x00000] in <filename unknown>:0
  at System.IO.StreamReader..ctor (System.String path, System.Text.Encoding encoding, Boolean detectEncodingFromByteOrderMarks, Int32 bufferSize) [0x00000] in <filename unknown>:0
  at System.IO.StreamReader..ctor (System.String path, System.Text.Encoding encoding) [0x00000] in <filename unknown>:0
  at (wrapper remoting-invoke-with-check) System.IO.StreamReader:.ctor (string,System.Text.Encoding)
  at Tomboy.NoteArchiver.ReadFile (System.String read_file, System.String uri) [0x00000] in <filename unknown>:0
  at Tomboy.NoteArchiver.Read (System.String read_file, System.String uri) [0x00000] in <filename unknown>:0
  at Tomboy.Note.Load (System.String read_file, Tomboy.NoteManager manager) [0x00000] in <filename unknown>:0
  at Tomboy.NoteManager.LoadNotes () [0x00000] in <filename unknown>:0
  at Tomboy.NoteManager.Initialize () [0x00000] in <filename unknown>:0
  at Tomboy.Tomboy+<Main>c__AnonStorey2.<>m__0 () [0x00000] in <filename unknown>:0
  at GLib.Timeout+TimeoutProxy.Handler () [0x00000] in <filename unknown>:0
   at GLib.ExceptionManager.RaiseUnhandledException(System.Exception e, Boolean is_terminal)
   at GLib.Timeout+TimeoutProxy.Handler()
   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)
marcos@Nero:~$

ProblemType: Bug
DistroRelease: Ubuntu 10.10
Package: tomboy 1.4.2-0ubuntu1
ProcVersionSignature: Ubuntu 2.6.35-23.37-generic 2.6.35.7
Uname: Linux 2.6.35-23-generic x86_64
NonfreeKernelModules: wl
Architecture: amd64
Date: Thu Nov 18 01:21:20 2010
EcryptfsInUse: Yes
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release amd64 (20101007)
ProcEnviron:
 LANGUAGE=pt_BR:pt:en
 LANG=pt_BR.utf8
 SHELL=/bin/bash
SourcePackage: tomboy