apport-gtk crashed with TypeError in function(): markup_escape_text() takes exactly 2 argument(s) (1 given)

apport crashes when it is launched on another application crash

ProblemType: Crash
DistroRelease: Ubuntu 11.10
Package: apport-gtk 1.21.3-0ubuntu1
ProcVersionSignature: Ubuntu 3.0.0-8.11-generic 3.0.1
Uname: Linux 3.0.0-8-generic i686
Architecture: i386
CrashReports:
 600:0:0:8826:2011-08-17 10:49:24.746874000 +0200:2011-08-17 12:45:02.352668894 +0200:/var/crash/_usr_bin_fontconfig-voodoo.0.crash
 600:1000:1000:31692:2011-08-17 12:51:39.249610000 +0200:2011-08-17 12:51:40.249610000 +0200:/var/crash/_usr_share_software-center_piston_get_reviews_helper.py.1000.crash
 600:1000:1000:28908:2011-08-17 14:49:17.184227000 +0200:2011-08-17 14:49:22.560227146 +0200:/var/crash/_usr_share_apport_apport-gtk.1000.crash
 600:1000:1000:10533579:2011-08-17 14:45:17.596232000 +0200:2011-08-17 14:47:02.644230723 +0200:/var/crash/_usr_bin_compiz.1000.crash
Date: Wed Aug 17 14:49:18 2011
ExecutablePath: /usr/share/apport/apport-gtk
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release i386 (20110427.1)
InterpreterPath: /usr/bin/python2.7
PackageArchitecture: all
ProcCmdline: /usr/bin/python /usr/share/apport/apport-gtk
ProcEnviron:
 PATH=(custom, no user)
 LANG=fr_FR.UTF-8
 SHELL=/bin/bash
PythonArgs: ['/usr/share/apport/apport-gtk']
SourcePackage: apport
Title: apport-gtk crashed with TypeError in function(): markup_escape_text() takes exactly 2 argument(s) (1 given)
UpgradeStatus: Upgraded to oneiric on 2011-08-17 (0 days ago)
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare