Tomboy synchronization with U1 does not work

When I'm trying to sync notes I'm getting error 'Could not synchronize notes. Check the details belown and try again'. Details are empty.

In log file I see following error:

[DEBUG 12:07:14.654] SyncThread using SyncServiceAddin: Tomboy Web
[DEBUG 12:07:14.668] Building web request for URL: https://one.ubuntu.com/notes/api/1.0/
[DEBUG 12:07:15.997] Building web request for URL: https://one.ubuntu.com/notes/api/1.0/user/
[DEBUG 12:07:16.659] 8
[DEBUG 12:07:16.660] Sync: GetNoteUpdatesSince rev -1
[DEBUG 12:07:16.662] Building web request for URL: https://one.ubuntu.com/notes/api/1.0/op/?include_notes=true
[ERROR 12:07:17.897] Synchronization failed with the following exception: expected ';' (3B) but found '=' (3D) Line 6, position 286.
  at Mono.Xml2.XmlTextReader.Expect (Int32 expected) [0x00000] in <filename unknown>:0
  at Mono.Xml2.XmlTextReader.ReadEntityReference (Boolean ignoreEntityReferences) [0x00000] in <filename unknown>:0
  at Mono.Xml2.XmlTextReader.ReadReference (Boolean ignoreEntityReferences) [0x00000] in <filename unknown>:0
  at Mono.Xml2.XmlTextReader.ReadText (Boolean notWhitespace) [0x00000] in <filename unknown>:0
  at Mono.Xml2.XmlTextReader.ReadContent () [0x00000] in <filename unknown>:0
  at Mono.Xml2.XmlTextReader.Read () [0x00000] in <filename unknown>:0
  at System.Xml.XmlTextReader.Read () [0x00000] in <filename unknown>:0
  at Tomboy.Sync.NoteUpdate..ctor (System.String xmlContent, System.String title, System.String uuid, Int32 latestRevision) [0x00000] in <filename unknown>:0
  at Tomboy.WebSync.WebSyncServer.GetNoteUpdatesSince (Int32 revision) [0x00000] in <filename unknown>:0
  at Tomboy.Sync.SyncManager.SynchronizationThread () [0x00000] in <filename unknown>:0

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: tomboy 1.10.1-0ubuntu1
ProcVersionSignature: Ubuntu 3.2.0-24.39-generic-pae 3.2.16
Uname: Linux 3.2.0-24-generic-pae i686
ApportVersion: 2.0.1-0ubuntu8
Architecture: i386
Date: Fri Jun 8 12:14:08 2012
EcryptfsInUse: Yes
SourcePackage: tomboy
UpgradeStatus: No upgrade log present (probably fresh install)