ubiquity crashed with InstallStepError in configure_user()

[newbe]

Binary package hint: ubiquity

Bug in ubiquity:

Tried to install Ubuntu 9.04 from live-CD without using Livemode.
Choosen lenguage: German
Partitioning: Manuel
No other costumations

ProblemType: Crash
Architecture: i386
DistroRelease: Ubuntu 9.04
ExecutablePath: /usr/lib/ubiquity/bin/ubiquity
InterpreterPath: /usr/bin/python2.6
MediaBuild: Ubuntu 9.04 "Jaunty Jackalope" - Release Candidate i386 (20090414.2)
Package: ubiquity 1.12.9
ProcAttrCurrent: unconfined
ProcCmdline: /usr/bin/python /usr/lib/ubiquity/bin/ubiquity --only
ProcEnviron:
 LANGUAGE=
 PATH=(custom, no user)
 LANG=de_DE.UTF-8
PythonArgs: ['/usr/lib/ubiquity/bin/ubiquity', '--only']
SourcePackage: ubiquity
Title: ubiquity crashed with InstallStepError in configure_user()
Uname: Linux 2.6.28-11-generic i686
UserGroups: