Tomboy - UbuntuOne failed to sync

[Lucazade]

I'm not able to sync tomboy notes with online UbuntuOne service.

02/10/2011 13.38.38 [INFO]: Initializing Mono.Addins
02/10/2011 13.38.40 [ERROR]: Unparsable last-sync-date element in /home/luca/.config/tomboy/manifest.xml
02/10/2011 13.39.01 [ERROR]: Error processing OAuth callback. Could be a sign that you pressed the button to reset the connection. Exception details:
02/10/2011 13.39.01 [ERROR]: System.ObjectDisposedException: The object was used after being disposed.
  at System.Net.ListenerAsyncResult.GetContext () [0x00000] in <filename unknown>:0
  at System.Net.HttpListener.EndGetContext (IAsyncResult asyncResult) [0x00000] in <filename unknown>:0
  at Tomboy.WebSync.WebSyncPreferencesWidget.<OnAuthButtonClicked>m__1 (IAsyncResult localResult) [0x00000] in <filename unknown>:0
02/10/2011 13.39.58 [ERROR]: Error cleaning up addin after sync: Object reference not set to an instance of an object
  at Tomboy.Sync.SyncManager.SynchronizationThread () [0x00000] in <filename unknown>:0
02/10/2011 13.40.46 [ERROR]: Caught exception. Message: The remote server returned an error: (400) BAD REQUEST.
02/10/2011 13.40.46 [ERROR]: Stack trace for previous exception: at System.Net.HttpWebRequest.CheckFinalStatus (System.Net.WebAsyncResult result) [0x00000] in <filename unknown>:0
  at System.Net.HttpWebRequest.SetResponseData (System.Net.WebConnectionData data) [0x00000] in <filename unknown>:0
02/10/2011 13.40.46 [ERROR]: Rest of stack trace for above exception: at System.Environment.get_StackTrace()
   at Tomboy.WebSync.Api.OAuth.MakeWebRequest(RequestMethod method, System.String url, System.Collections.Generic.List`1 parameters, System.String postData)
   at Tomboy.WebSync.Api.OAuth.WebRequest(RequestMethod method, System.String url, System.String postData)
   at Tomboy.WebSync.Api.OAuth.Post(System.String uri, IDictionary`2 queryParameters, System.String postValue)
   at Tomboy.WebSync.Api.OAuth.GetAccessAfterAuthorization()
   at Tomboy.WebSync.WebSyncPreferencesWidget.<OnAuthButtonClicked>m__1(IAsyncResult localResult)
   at System.Net.ListenerAsyncResult.InvokeCallback(System.Object o)
02/10/2011 13.40.57 [ERROR]: Error cleaning up addin after sync: Object reference not set to an instance of an object
  at Tomboy.Sync.SyncManager.SynchronizationThread () [0x00000] in <filename unknown>:0

ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: tomboy 1.8.0-1ubuntu1 [modified: usr/share/applications/tomboy.desktop]
ProcVersionSignature: Ubuntu 3.0.0-12.19-generic 3.0.4
Uname: Linux 3.0.0-12-generic i686
NonfreeKernelModules: nvidia
ApportVersion: 1.23-0ubuntu2
Architecture: i386
Date: Mon Oct 3 12:13:58 2011
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Beta i386 (20111001)
ProcEnviron:
 LANG=it_IT.UTF-8
 SHELL=/bin/bash
SourcePackage: tomboy
UpgradeStatus: No upgrade log present (probably fresh install)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Luiz Augusto (luizaugustopc)]

Same here, there is no 'Ubuntu one' option on Sync/Service

[nick (swcodfather)]

This is the error I'm seeing.

[ERROR 15:42:52.924] Unparsable last-sync-date element in /home/nhaddock/.config/tomboy/manifest.xml
[ERROR 15:43:20.415] Synchronization failed with the following exception: Unexpected character '<' at [2:0]
  at Hyena.Json.Tokenizer.UnexpectedCharacter (Char ch) [0x00000] in <filename unknown>:0
  at Hyena.Json.Tokenizer.InnerScan () [0x00000] in <filename unknown>:0
  at Hyena.Json.Tokenizer.Scan () [0x00000] in <filename unknown>:0
  at Hyena.Json.Deserializer.CheckScan (TokenType expected, Boolean eofok) [0x00000] in <filename unknown>:0
  at Hyena.Json.Deserializer.Deserialize () [0x00000] in <filename unknown>:0
  at Tomboy.WebSync.Api.UserInfo.ParseJson (System.String jsonString) [0x00000] in <filename unknown>:0
  at Tomboy.WebSync.Api.UserInfo.GetUser (System.String userUri, IWebConnection connection) [0x00000] in <filename unknown>:0
  at Tomboy.WebSync.WebSyncServer.BeginSyncTransaction () [0x00000] in <filename unknown>:0
  at Tomboy.Sync.SyncManager.SynchronizationThread () [0x00000] in <filename unknown>:0

(Tomboy:29594): GLib-CRITICAL **: g_source_remove: assertion `tag > 0' failed