[Lucid Alpha] ubi-partman crases w/ error 141 in Kubuntu manual partitioning

Binary package hint: ubiquity

Installing Kubuntu Lucid using latest ISO build as of 10 March.
64bit install to a VirtualBox VM using Manual Partitioning.

Partitioning fails as ubi-partman crashes with error 141.

I noticed one bug note that mentions this happening when networking is not
active. In my case, however, networking is fully active.

ProblemType: Bug
Architecture: amd64
Date: Thu Mar 11 13:55:29 2010
DistroRelease: Ubuntu 10.04
LiveMediaBuild: Kubuntu 10.04 "Lucid Lynx" - Alpha amd64 (20100310)
Package: ubiquity 2.1.33
ProcEnviron:
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.32-16.25-generic
SourcePackage: ubiquity
Uname: Linux 2.6.32-16-generic x86_64