xclock grabs alt-tab from gnome-shell

[themusicgod1]

1) run xclock
2) try to alt-tab
the alt-tab menu doesn't come up and the active window does not change.
it doesn't matter if xclock is the current active window or not.

x11-apps:
  Installed: 7.7+3
  Candidate: 7.7+3
  Version table:
 *** 7.7+3 0
        500 http://ca.archive.ubuntu.com/ubuntu/ utopic/main amd64 Packages
        100 /var/lib/dpkg/status
ubuntu: 14.10 utopic

ProblemType: Bug
DistroRelease: Ubuntu 14.10
Package: x11-apps 7.7+3
ProcVersionSignature: Ubuntu 3.16.0-23.31-generic 3.16.4
Uname: Linux 3.16.0-23-generic x86_64
.tmp.unity.support.test.0:

ApportVersion: 2.14.7-0ubuntu8
Architecture: amd64
BootLog:
 * Starting userspace bootsplash utility[ OK ]
  * Setting sensors limits 
[ OK ]
  * Setting up X socket directories... 
[ OK ]
CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
CompositorRunning: None
CurrentDesktop: GNOME
Date: Sat Oct 25 16:43:40 2014
DistUpgraded: Fresh install
DistroCodename: utopic
DistroVariant: ubuntu
EcryptfsInUse: Yes
GraphicsCard:
 Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller [8086:0116] (rev 09) (prog-if 00 [VGA controller])
   Subsystem: Acer Incorporated [ALI] Device [1025:0712]
InstallationDate: Installed on 2014-07-09 (108 days ago)
InstallationMedia: Ubuntu-GNOME 14.10 "Utopic Unicorn" - Alpha amd64 (20140708)
MachineType: Acer TravelMate X483
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.16.0-23-generic root=UUID=885e04f0-bd26-4885-aa1c-f134c674b8ff ro quiet splash vt.handoff=7
SourcePackage: x11-apps
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 08/23/2012
dmi.bios.vendor: Insyde Corp.
dmi.bios.version: V1.05
dmi.board.asset.tag: Type2 - Board Asset Tag
dmi.board.name: MA40_HX
dmi.board.vendor: Acer
dmi.board.version: Type2 - Board Version
dmi.chassis.type: 10
dmi.chassis.vendor: Chassis Manufacturer
dmi.chassis.version: Chassis Version
dmi.modalias: dmi:bvnInsydeCorp.:bvrV1.05:bd08/23/2012:svnAcer:pnTravelMateX483:pvrV1.05:rvnAcer:rnMA40_HX:rvrType2-BoardVersion:cvnChassisManufacturer:ct10:cvrChassisVersion:
dmi.product.name: TravelMate X483
dmi.product.version: V1.05
dmi.sys.vendor: Acer
version.compiz: compiz 1:0.9.12+14.10.20140918-0ubuntu1
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.56-1
version.libgl1-mesa-dri: libgl1-mesa-dri 10.3.0-0ubuntu3
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 10.3.0-0ubuntu3
version.xserver-xorg-core: xserver-xorg-core 2:1.16.0-1ubuntu1
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.9.0-1ubuntu2
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.4.0-2ubuntu2
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.914-1~exp1ubuntu4
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.11-1ubuntu2
xserver.bootTime: Sat Oct 25 10:14:57 2014
xserver.configfile: default
xserver.errors:

xserver.logfile: /var/log/Xorg.0.log
xserver.outputs:
 product id 885
 vendor LGD
xserver.version: 2:1.16.0-1ubuntu1

[themusicgod1 (themusicgod1)]

Still an issue with Ubuntu 15.04 / x11-apps 7.7+4

[themusicgod1 (themusicgod1)]

No longer happens in xenial.