ubiquity crashed with InstallStepError in configure_ma()

[Charles Hixson]

Binary package hint: ubiquity

This error was automatically generated by the installer.

I don't really know what the problem is, but I have a set of partitions configured:
/sda1 : /fc6/boot
/sda2: /fc6
/sda3: /fc6/home

and I had to manually umount /target/fc6/boot and /target/fc6/home before I could umount /fc6...and ubiquity asked me to do the umount. It crashed very soon after I clicked continue. This may not be related...but...

ProblemType: Crash
Architecture: i386
DistroRelease: Ubuntu 8.10
ExecutablePath: /usr/lib/ubiquity/bin/ubiquity
InterpreterPath: /usr/bin/python2.5
Package: ubiquity 1.9.10
ProcAttrCurrent: unconfined
ProcCmdline: /usr/bin/python /usr/lib/ubiquity/bin/ubiquity gtk_ui
ProcEnviron: Error: [Errno 13] Permission denied: '/proc/10278/environ'
PythonArgs: ['/usr/lib/ubiquity/bin/ubiquity', 'gtk_ui']
SourcePackage: ubiquity
Title: ubiquity crashed with InstallStepError in configure_ma()
Uname: Linux 2.6.27-2-generic i686
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