ubiquity crashed with InstallStepError in configure_ma()

[Giancaldo]

Binary package hint: ubiquity

Using a usb key I made with unetbooting, Jaunty seems to crash near the end of installation. I think it crashes at around 90% completion on "...Documents and Settings".

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 i386 (20090420.1)
Package: ubiquity 1.12.12
ProcAttrCurrent: unconfined
ProcCmdline: /usr/bin/python /usr/lib/ubiquity/bin/ubiquity gtk_ui
ProcEnviron: Error: [Errno 13] Permission denied: '/proc/8989/environ'
PythonArgs: ['/usr/lib/ubiquity/bin/ubiquity', 'gtk_ui']
SourcePackage: ubiquity
Title: ubiquity crashed with InstallStepError in configure_ma()
Uname: Linux 2.6.28-11-generic i686
UserGroups:

[Giancaldo (giancaldo)]

I do have another installation in another partition of Jaunty beta. I don't know if that has antyhing to do with it. I'm also using ext4 on '/home' and '/'.

[Giancaldo (giancaldo)]

I managed to fix it by removing the Ubuntu installation on the other partition. I guess it's a bug in the migration-assistant thing.