emesene crashed with AssertionError in send_message()

chat with a Freind :s

ProblemType: Crash
DistroRelease: Ubuntu 11.10
Package: emesene 2.11.7+dfsg-1ubuntu1
ProcVersionSignature: Ubuntu 3.0.0-10.16-generic 3.0.4
Uname: Linux 3.0.0-10-generic x86_64
NonfreeKernelModules: wl
Architecture: amd64
Date: Fri Sep 9 00:35:37 2011
ExecutablePath: /usr/share/emesene/emesene/emesene
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Beta amd64 (20110901)
InterpreterPath: /usr/bin/python2.7
PackageArchitecture: all
ProcCmdline: python /usr/bin/emesene
ProcEnviron:
 LANGUAGE=es_MX:es
 PATH=(custom, no user)
 LANG=es_MX.UTF-8
 SHELL=/bin/bash
PythonArgs: ['/usr/bin/emesene']
SourcePackage: emesene
Title: emesene crashed with AssertionError in send_message()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare