Public bug reported:

Say we have 2 windows of the same application (same unity icon) opened. 
The first is with 'Always On Top' option active, the second is not.
If there is any third arbitrary window overlapping the second, then clicking on 
the application icon or using 'Super+N' to trigger switching between 
application windows will not work.

ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: unity 6.10.0-0ubuntu2
ProcVersionSignature: Ubuntu 3.5.0-18.29-generic 3.5.7
Uname: Linux 3.5.0-18-generic x86_64
NonfreeKernelModules: nvidia
.proc.driver.nvidia.gpus.0: Error: [Errno 21] Is a directory: 
'/proc/driver/nvidia/gpus/0'
.proc.driver.nvidia.registry: Binary: ""
.proc.driver.nvidia.version:
 NVRM version: NVIDIA UNIX x86_64 Kernel Module  304.64  Tue Oct 30 10:58:20 
PDT 2012
 GCC version:  gcc version 4.7.2 (Ubuntu/Linaro 4.7.2-2ubuntu1)
.tmp.unity.support.test.0:
 
ApportVersion: 2.6.1-0ubuntu6
Architecture: amd64
CheckboxSubmission: 0d4fdf04c454b502aef513e05b53cc1f
CheckboxSystem: edda5d4f616ca792bf437989cb597002
CompizPlugins: 
[core,bailer,detection,composite,opengl,decor,grid,vpswitch,commands,regex,gnomecompat,imgpng,move,place,snap,resize,obs,compiztoolbox,mousepoll,wall,unitymtgrabhandles,animation,session,expo,fade,workarounds,ezoom,scale,unityshell]
CompositorRunning: compiz
Date: Wed Nov 28 22:55:26 2012
DistUpgraded: 2012-10-20 01:14:14,762 DEBUG enabling apt cron job
DistroCodename: quantal
DistroVariant: ubuntu
DkmsStatus:
 nvidia-current, 304.64, 3.5.0-17-generic, x86_64: installed
 nvidia-current, 304.64, 3.5.0-18-generic, x86_64: installed
 vboxhost, 4.1.22, 3.5.0-17-generic, x86_64: installed
 vboxhost, 4.1.22, 3.5.0-18-generic, x86_64: installed
GraphicsCard:
 NVIDIA Corporation GF104 [GeForce GTX 460] [10de:0e22] (rev a1) (prog-if 00 
[VGA controller])
   Subsystem: Giga-byte Technology Device [1458:34fc]
InstallationDate: Installed on 2011-02-01 (665 days ago)
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release amd64 (20101007)
JockeyStatus:
 kmod:nvidia_experimental_304 - Experimental NVIDIA binary Xorg driver, kernel 
module and VDPAU library (Proprietary, Disabled, Not in use)
 kmod:nvidia_experimental_310 - Experimental NVIDIA binary Xorg driver, kernel 
module and VDPAU library (Proprietary, Disabled, Not in use)
 kmod:nvidia_current - nvidia_current (Proprietary, Enabled, Not in use)
 kmod:nvidia_current_updates - NVIDIA binary Xorg driver, kernel module and 
VDPAU library (Proprietary, Disabled, Not in use)
MachineType: System manufacturer System Product Name
MarkForUpload: True
PlymouthDebug: Error: [Errno 13] Permission denied: 
'/var/log/plymouth-debug.log'
ProcEnviron:
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.5.0-18-generic 
root=UUID=1c4b72d4-91cb-4a55-be43-a7bcff5643b1 ro quiet splash
SourcePackage: unity
UpgradeStatus: Upgraded to quantal on 2012-10-19 (39 days ago)
dmi.bios.date: 07/23/2010
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 1807
dmi.board.asset.tag: To Be Filled By O.E.M.
dmi.board.name: P7P55D PRO
dmi.board.vendor: ASUSTeK Computer INC.
dmi.board.version: Rev 1.xx
dmi.chassis.asset.tag: Asset-1234567890
dmi.chassis.type: 3
dmi.chassis.vendor: Chassis Manufacture
dmi.chassis.version: Chassis Version
dmi.modalias: 
dmi:bvnAmericanMegatrendsInc.:bvr1807:bd07/23/2010:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKComputerINC.:rnP7P55DPRO:rvrRev1.xx:cvnChassisManufacture:ct3:cvrChassisVersion:
dmi.product.name: System Product Name
dmi.product.version: System Version
dmi.sys.vendor: System manufacturer
version.compiz: compiz 1:0.9.8.4+bzr3407-0ubuntu1
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.39-0ubuntu1
version.libgl1-mesa-dri: libgl1-mesa-dri 9.0-0ubuntu1
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 9.0-0ubuntu1
version.nvidia-graphics-drivers: nvidia-graphics-drivers N/A
version.xserver-xorg-core: xserver-xorg-core 2:1.13.0-0ubuntu6
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.7.3-0ubuntu2
version.xserver-xorg-video-ati: xserver-xorg-video-ati 
1:6.99.99~git20120913.8637f772-0ubuntu1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.20.9-0ubuntu2
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.2-0ubuntu3

** Affects: unity (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug compiz-0.9 possible-manual-nvidia-install quantal 
running-unity third-party-packages ubuntu

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https://bugs.launchpad.net/bugs/1084228

Title:
  Application windows switch is not working with 'always on top' option
  active

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