bzr crashed with UnicodeDecodeError in run_subprocess_command(): 'ascii' codec can't decode byte 0xc3 in position 29: ordinal not in range(128)

[Pfundrabui]

Try to push my local rep to the main rep on a networkdrive wich i mounted to a folder in my homedirectory. In the main rep are logs with german letters.
system: lubuntu 11.04

ProblemType: Crash
DistroRelease: Ubuntu 11.04
Package: bzr 2.3.1-1ubuntu1
ProcVersionSignature: Ubuntu 2.6.38-10.46-generic 2.6.38.7
Uname: Linux 2.6.38-10-generic i686
Architecture: i386
BzrDebugFlags: set()
BzrVersion: 2.3.1
CommandLine:
 ['/usr/bin/bzr',
  'qsubprocess',
  '--bencode',
  'l4:push51:/home/bluescreen44/Festplatte/BazaarSoftware/trunk/e']
CrashDb: bzr
Date: Tue Jul 19 13:22:32 2011
ExecutablePath: /usr/bin/bzr
FileSystemEncoding: UTF-8
InterpreterPath: /usr/bin/python2.7
Locale: de_DE.UTF-8
PackageArchitecture: all
Platform: Linux-2.6.38-10-generic-i686-with-Ubuntu-11.04-natty
ProcCmdline: /usr/bin/python /usr/bin/bzr qsubprocess --bencode l4:push51:/home/username/Festplatte/BazaarSoftware/trunk/e
ProcEnviron:
 LANG=de_DE.UTF-8
 SHELL=/bin/bash
 LANGUAGE=de
PythonVersion: 2.7.1
SourcePackage: bzr
Title: bzr crashed with UnicodeDecodeError in run_subprocess_command(): 'ascii' codec can't decode byte 0xc3 in position 29: ordinal not in range(128)
UpgradeStatus: No upgrade log present (probably fresh install)
UserEncoding: UTF-8
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare

[Martin Packman (gz)]

To resolve this issue, upgrade the qbzr plugin to 0.20.1 or later version.