Public bug reported:

To replicate:
1.  Enable multiple desktops.  I assume that you will also have the keyboard 
shortcuts enabled.  Ctrl+Alt+Shift+ Arrow Key will move a window to a desktop 
in that direction; Ctrl+Alt+Arrow Key will move your current display to a 
desktop in that direction.
2.  Make a full screen window.
3.  Move that window to a different desktop (ie, Ctrl+Alt+Shift+Right).
4.  Before the window has finished moving to the new desktop, move your view 
back to the old desktop (ie, Ctrl+Alt+Left)

If you timed it correctly, the window will be frozen between the two
desktops.  The problem persists even if you move the window between
desktops.  You can fix it by sending it to one side (Ie,
Ctrl+Windows+Left).

I am running an updated Raring build on a cheap Asus Eee PC.  I have a
computer science background if you have any questions that would help
debugging the issue.

ProblemType: Bug
DistroRelease: Ubuntu 13.04
Package: xorg 1:7.7+1ubuntu4
ProcVersionSignature: Ubuntu 3.8.0-19.29-generic 3.8.8
Uname: Linux 3.8.0-19-generic i686
.tmp.unity.support.test.0:
 
ApportVersion: 2.9.2-0ubuntu8
Architecture: i386
CompizPlugins: 
[core,composite,opengl,decor,vpswitch,compiztoolbox,imgpng,move,resize,neg,grid,gnomecompat,mousepoll,unitymtgrabhandles,snap,place,regex,session,animation,wall,expo,ezoom,workarounds,fade,scale,unityshell]
CompositorRunning: compiz
CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0'
CompositorUnredirectFSW: true
Date: Fri May  3 15:59:45 2013
DistUpgraded: 2013-04-25 21:03:26,309 DEBUG enabling apt cron job
DistroCodename: raring
DistroVariant: ubuntu
ExtraDebuggingInterest: Yes
GraphicsCard:
 Intel Corporation Atom Processor D4xx/D5xx/N4xx/N5xx Integrated Graphics 
Controller [8086:a011] (rev 02) (prog-if 00 [VGA controller])
   Subsystem: ASUSTeK Computer Inc. Device [1043:83ac]
   Subsystem: ASUSTeK Computer Inc. Device [1043:83ac]
InstallationDate: Installed on 2011-10-01 (580 days ago)
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release i386 (20110427.1)
MachineType: ASUSTeK Computer INC. 1015PX
MarkForUpload: True
ProcEnviron:
 TERM=xterm
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/zsh
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.8.0-19-generic 
root=UUID=8b5ac737-eb56-4fac-8ed1-dc11e85bbeb8 ro quiet splash vt.handoff=7
SourcePackage: xorg
Symptom: display
UpgradeStatus: Upgraded to raring on 2013-04-26 (7 days ago)
dmi.bios.date: 02/18/2011
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 1101
dmi.board.asset.tag: To Be Filled By O.E.M.
dmi.board.name: 1015PE
dmi.board.vendor: ASUSTeK Computer INC.
dmi.board.version: x.xx
dmi.chassis.asset.tag: 0x00000000
dmi.chassis.type: 10
dmi.chassis.vendor: ASUSTeK Computer INC.
dmi.chassis.version: x.x
dmi.modalias: 
dmi:bvnAmericanMegatrendsInc.:bvr1101:bd02/18/2011:svnASUSTeKComputerINC.:pn1015PX:pvrx.x:rvnASUSTeKComputerINC.:rn1015PE:rvrx.xx:cvnASUSTeKComputerINC.:ct10:cvrx.x:
dmi.product.name: 1015PX
dmi.product.version: x.x
dmi.sys.vendor: ASUSTeK Computer INC.
version.compiz: compiz 1:0.9.9~daily13.04.18.1~13.04-0ubuntu1
version.libdrm2: libdrm2 2.4.43-0ubuntu1
version.libgl1-mesa-dri: libgl1-mesa-dri 9.1.1-0ubuntu3
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 9.1.1-0ubuntu3
version.xserver-xorg-core: xserver-xorg-core 2:1.13.3-0ubuntu6
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.7.3-0ubuntu2b2
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.1.0-0ubuntu2
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.21.6-0ubuntu4
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.7-0ubuntu1
xserver.bootTime: Fri Apr 26 12:51:13 2013
xserver.configfile: default
xserver.logfile: /var/log/Xorg.0.log
xserver.version: 2:1.13.3-0ubuntu6
xserver.video_driver: intel

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


** Tags: apport-bug compiz-0.9 i386 raring ubuntu

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https://bugs.launchpad.net/bugs/1176232

Title:
  Race Condition: Moving A Window Between Virtual Desktops and Switching
  Virtual Desktops

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