gnome-language-selector crashed with TypeError in getUserDefaultLanguage(): can't use a string pattern on a bytes-like object

I tried to change language (or at least keyboard) and a window flashed up but was closed, and the apport system caught it. This is an installed Lubuntu 32-bit system (13.10 alpha)

ProblemType: Crash
DistroRelease: Ubuntu 13.10
Package: language-selector-gnome 0.113
ProcVersionSignature: Ubuntu 3.9.0-7.15-generic 3.9.7
Uname: Linux 3.9.0-7-generic i686
ApportVersion: 2.10.2-0ubuntu2
Architecture: i386
CrashCounter: 1
Date: Wed Jun 26 20:29:41 2013
ExecutablePath: /usr/bin/gnome-language-selector
InstallationDate: Installed on 2013-06-25 (1 days ago)
InstallationMedia: Lubuntu 13.10 "Saucy Salamander" - Alpha i386 (20130624)
InterpreterPath: /usr/bin/python3.3
MarkForUpload: True
PackageArchitecture: all
ProcCmdline: /usr/bin/python3.3 /usr/bin/gnome-language-selector
PythonArgs: ['/usr/bin/gnome-language-selector']
SourcePackage: language-selector
Title: gnome-language-selector crashed with TypeError in getUserDefaultLanguage(): can't use a string pattern on a bytes-like object
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo