quitting Gnome 3 or Unity session with tomboy launched takes a long time

[Valezan]

On Ubuntu 11.10, whenever I quit my Gnome 3 or Unity session with tomboy launched, it takes a long time to do it (at least one minutes). It doesn't happen if I had quit Tomboy before.

Description: Ubuntu 11.10
Release: 11.10

tomboy:
  Installé : 1.8.0-1ubuntu1.1
  Candidat : 1.8.0-1ubuntu1.1
 Table de version :
 *** 1.8.0-1ubuntu1.1 0
        500 http://www-ftp.lip6.fr/pub/linux/distributions/Ubuntu/archive/ oneiric-updates/main i386 Packages
        100 /var/lib/dpkg/status
     1.8.0-1ubuntu1 0
        500 http://www-ftp.lip6.fr/pub/linux/distributions/Ubuntu/archive/ oneiric/main i386 Packages
     1.4.2-0ubuntu1~ppa~maverick0 0
        500 http://ppa.launchpad.net/tomboy-packagers/stable/ubuntu/ maverick/main i386 Packages

ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: tomboy 1.8.0-1ubuntu1.1
ProcVersionSignature: Ubuntu 3.0.0-13.21-generic 3.0.6
Uname: Linux 3.0.0-13-generic i686
ApportVersion: 1.23-0ubuntu4
Architecture: i386
Date: Fri Oct 28 18:42:40 2011
ExecutablePath: /usr/lib/tomboy/Tomboy.exe
InterpreterPath: /usr/bin/mono
SourcePackage: tomboy
UpgradeStatus: Upgraded to oneiric on 2011-10-27 (0 days ago)