when i click on options it shows me the app has a problem ( bad english sorry )

[mohammed]

Binary package hint: emesene

when i click on options it shows me the app has a problem ( bad english sorry )

ProblemType: Crash
DistroRelease: Ubuntu 11.04
Package: emesene 2.0~git20110319+dfsg-1
ProcVersionSignature: Ubuntu 2.6.38-8.42-generic 2.6.38.2
Uname: Linux 2.6.38-8-generic i686
Architecture: i386
Date: Sat Apr 16 08:33:12 2011
ExecutablePath: /usr/share/emesene/emesene/emesene
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release i386 (20101007)
InterpreterPath: /usr/bin/python2.7
PackageArchitecture: all
ProcCmdline: python /usr/bin/emesene
ProcEnviron:
 LANGUAGE=ar_SA:en
 LANG=ar_SA.UTF-8
 SHELL=/bin/bash
PythonArgs: ['/usr/bin/emesene']
SourcePackage: emesene
Title: emesene crashed with TypeError in _on_extension_changed(): 'NoneType' object does not support item assignment
Traceback:
 Traceback (most recent call last):
   File "/usr/share/emesene/emesene/gui/gtkui/Preferences.py", line 705, in _on_extension_changed
     self.session.config.d_extensions[category] = identifier
 TypeError: 'NoneType' object does not support item assignment
UpgradeStatus: Upgraded to natty on 2011-04-15 (0 days ago)
UserGroups: adm admin audio avahi avahi-autoipd bin cdrom dialout dip fax floppy fuse lp lpadmin mail netdev nopasswdlogin plugdev pulse pulse-access root sambashare src ssh sudo tape uucp 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 #729124, 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.