desktopcouch-service crashed with ValueError

[Define]

Binary package hint: desktopcouch

lsb_release -rd
Description: Ubuntu Natty (development branch)
Release: 11.04

apt-cache policy desktopcouch
desktopcouch:
  Усталяваныя: 1.0.6-0ubuntu1
  Кандыдат: 1.0.6-0ubuntu1
  Табліца вэрсіяў:
 *** 1.0.6-0ubuntu1 0
        500 http://ftp.byfly.by/ubuntu/ natty/main i386 Packages
        100 /var/lib/dpkg/status

I have updated the system through the command 'apt-get dist-upgrade'.
After rebooting, this error appeared.

ProblemType: Crash
DistroRelease: Ubuntu 11.04
Package: desktopcouch 1.0.6-0ubuntu1
ProcVersionSignature: Ubuntu 2.6.38-6.34-generic 2.6.38-rc7
Uname: Linux 2.6.38-6-generic i686
Architecture: i386
CheckboxSubmission: 374fabc7cc5853bb56d3cfd08ed72cb4
CheckboxSystem: 0531969bcfd4f03af7405c98dc94a948
Date: Thu Mar 10 12:17:38 2011
ExecutablePath: /usr/lib/desktopcouch/desktopcouch-service
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Alpha i386 (20101202)
InterpreterPath: /usr/bin/python2.7
PackageArchitecture: all
ProcCmdline: /usr/bin/python /usr/lib/desktopcouch/desktopcouch-service
ProcEnviron:
 SHELL=/bin/bash
 LC_MESSAGES=be_BY.UTF-8
 LANGUAGE=be_BY:ru_RU:ru:en_GB:en
 LANG=ru_RU.UTF-8
PythonArgs: ['/usr/lib/desktopcouch/desktopcouch-service']
SourcePackage: desktopcouch
Title: desktopcouch-service crashed with ValueError in call_blocking(): Unable to guess signature from an empty dict
UpgradeStatus: Upgraded to natty on 2011-03-04 (5 days ago)
UserGroups: adm admin audio cdrom dialout dip fax floppy fuse lpadmin netdev plugdev sambashare vboxusers video www-data

[Apport retracing service (apport)]

Thank you for taking the time to report this crash and helping to make Ubuntu better. This particular crash has already been reported and is a duplicate of bug #731159, so is being marked as such. Please look at the other bug report to see if there is any missing information that you can provide, or to see if there is a workaround for the bug. Additionally, any further discussion regarding the bug should occur in the other report. Please continue to report any other bugs you may find.