Installer crashed when free software installed with manual partitioning

Occurred during free software installation with manual partitioning

One partition with ext4 mounted on /, swap and another ext4 mounted on /boot

ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: ubiquity 2.12.12
ProcVersionSignature: Ubuntu 3.5.0-17.28-generic 3.5.5
Uname: Linux 3.5.0-17-generic x86_64
ApportVersion: 2.6.1-0ubuntu3
Architecture: amd64
CasperVersion: 1.328
Date: Mon Oct 15 20:27:44 2012
InstallCmdLine: file=/cdrom/preseed/ubuntu.seed boot=casper only-ubiquity initrd=/casper/initrd.lz quiet splash -- apt-setup/restricted=false apt-setup/multiverse=false
LiveMediaBuild: Ubuntu 12.10 "Quantal Quetzal" - Release amd64 (20121015.2)
ProcEnviron:
 LANGUAGE=en_GB.UTF-8
 TERM=linux
 PATH=(custom, no user)
 LANG=en_GB.UTF-8
SourcePackage: ubiquity
UpgradeStatus: No upgrade log present (probably fresh install)