xubuntu 14.04 beta1 installation crash

[Arnau Bosch]

cannot install in uefi mode

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: ubiquity 2.17.8 [modified: lib/partman/automatically_partition/question]
ProcVersionSignature: Ubuntu 3.13.0-12.32-generic 3.13.4
Uname: Linux 3.13.0-12-generic x86_64
ApportVersion: 2.13.2-0ubuntu5
Architecture: amd64
CasperVersion: 1.337
Date: Wed Mar 5 01:48:17 2014
InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/xubuntu.seed boot=casper only-ubiquity quiet splash --
LiveMediaBuild: Xubuntu 14.04 LTS "Trusty Tahr" - Alpha amd64 (20140225)
ProcEnviron:
 LANGUAGE=ca_ES.UTF-8
 TERM=linux
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=ca_ES.UTF-8
SourcePackage: grub-installer
UpgradeStatus: No upgrade log present (probably fresh install)