Installing in UEFI mode gives warning which can not be bypassed

[DonnieD]

Booted from USB stick in UEFI mode to live Ubuntu 15.04 Beta2. Installer gives error after selecting and partitioning (Automatically) hard disk. When Clicking Continue nothing happens, warning still apears and installation won't continue
 See warning picture attached.

ProblemType: Bug
DistroRelease: Ubuntu 15.04
Package: ubiquity 2.21.17
ProcVersionSignature: Ubuntu 3.19.0-10.10-generic 3.19.2
Uname: Linux 3.19.0-10-generic x86_64
ApportVersion: 2.16.2-0ubuntu4
Architecture: amd64
CasperVersion: 1.356
CurrentDesktop: Unity
Date: Fri Mar 27 10:49:16 2015
InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz.efi file=/cdrom/preseed/ubuntu.seed boot=casper quiet splash ---
LiveMediaBuild: Ubuntu 15.04 "Vivid Vervet" - Beta amd64 (20150326)
ProcEnviron:
 TERM=xterm
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: ubiquity
UpgradeStatus: No upgrade log present (probably fresh install)

[DonnieD (donnied)]

If I click Continue in Installer window not in Warning dialog Install continues at it should be. So just Warning message won't close as It should

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.