schroot cant mount large file

When using a loopback file to enter a root jail, schroot gives an error saying that "stat" failed because the file was too big.

$ schroot -c background
A: Grupo 'sbuild' não encontrado
A: Grupo 'sbuild' não encontrado
E: /var/local/background: Falhou o 'stat' ao ficheiro: Valor muito extenso para o tipo de dados definido

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: schroot 1.4.17-1
ProcVersionSignature: Ubuntu 2.6.38-11.48-generic-pae 2.6.38.8
Uname: Linux 2.6.38-11-generic-pae i686
NonfreeKernelModules: nvidia wl
Architecture: i386
Date: Fri Sep 2 23:36:54 2011
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release i386 (20110427.1)
ProcEnviron:
 LANGUAGE=pt_BR:en
 PATH=(custom, user)
 LANG=pt_BR.UTF-8
 SHELL=/bin/bash
SourcePackage: schroot
UpgradeStatus: No upgrade log present (probably fresh install)