Installer crashed while copying files in Xubuntu

Opening a new bug because this happened on Xubuntu using the 2nd respin disk of the day (20111129.2)

I just pulled down the new respin xubuntu 32bit iso. I'm installing to a 32bit VM on a 64bit Host with VMWare as the virtualization service.

The first install attempt was entirely successful. The second was a failure, ending in a random installer crash and apport firing.
Earlier today when I tried this with Ubuntu 32bit on the same VM, it occurred 2/2 times. so far for Xubuntu, it's 1/2 times.

The only difference between the successful attempt and the unsuccessful attempt is that the successful install was a full-disk install while the failed attempt is a side-by-side install.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: ubiquity 2.9.5
ProcVersionSignature: Ubuntu 3.2.0-2.5-generic 3.2.0-rc3
Uname: Linux 3.2.0-2-generic i686
ApportVersion: 1.90-0ubuntu1
Architecture: i386
CasperVersion: 1.292
Date: Tue Nov 29 17:16:29 2011
LiveMediaBuild: Xubuntu 12.04 "Precise Pangolin" - Alpha i386 (20111129.2)
ProcEnviron:
 LANGUAGE=
 PATH=(custom, no user)
 LANG=en_US.UTF-8
SourcePackage: ubiquity
UpgradeStatus: No upgrade log present (probably fresh install)