Installer crashed on MacBook Pro 8,2

I booted into the oneiric amd64+mac live CD, clicked Try Ubuntu, and then launched the installer from its desktop icon. I allowed downloading of updates and third-party software. The installation proceeded smoothly for about 20+ minutes, but then crashed. Immediately after the installer crashed there was another error about not being able to install Flash Player 10.3. Sorry but I no longer have the exact message handy. This installation was to /sda4 on a MacBook Pro 8,2, alongside Snow Leopard and Windows 7. I was overwriting a previous install of Oneiric beta, and chose to reformat that ext4 partition.

ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: ubiquity 2.8.4
ProcVersionSignature: Ubuntu 3.0.0-12.19-generic 3.0.4
Uname: Linux 3.0.0-12-generic x86_64
ApportVersion: 1.23-0ubuntu2
Architecture: amd64
CasperVersion: 1.285
Date: Fri Oct 7 14:08:06 2011
LiveMediaBuild: Ubuntu 11.10 "Oneiric Ocelot" - Beta amd64+mac (20111007)
ProcEnviron:
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: ubiquity
UpgradeStatus: No upgrade log present (probably fresh install)