Windows keep sneaking onto the wrong workspace.

Every time I maximize or snap a window to an edge of the screen, it seems like compiz ends up accidentally assigning it to more than one desktop.

So, if I have the default 4 desktops and I maximize in desktop 1, the window shows up in desktop 2 and 3 because the shadow around the edge spills over to the other desktops.

This is annoying and it seems like compiz isn't clipping windows to the right desktop based on the one they're maximized in. Instead, it's calculating membership of desktop based on whether the window happens to be rendering pixels in it.

This can create some VERY confusing situations where the desktop experience just feels totally broken.

ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: compiz 1:0.9.8.4+bzr3407-0ubuntu1
ProcVersionSignature: Ubuntu 3.5.0-18.29-generic 3.5.7
Uname: Linux 3.5.0-18-generic x86_64
.tmp.unity.support.test.0:

ApportVersion: 2.6.1-0ubuntu6
Architecture: amd64
CompizPlugins: [core,bailer,detection,composite,opengl,compiztoolbox,decor,vpswitch,imgpng,snap,unitymtgrabhandles,gnomecompat,move,place,mousepoll,regex,resize,wall,animation,session,grid,expo,workarounds,fade,ezoom,scale,unityshell]
CompositorRunning: compiz
Date: Mon Nov 26 10:10:34 2012
DistUpgraded: 2012-10-20 09:49:21,487 DEBUG enabling apt cron job
DistroCodename: quantal
DistroVariant: ubuntu
GraphicsCard:
 Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller [8086:0102] (rev 09) (prog-if 00 [VGA controller])
   Subsystem: ASUSTeK Computer Inc. Device [1043:844d]
InstallationDate: Installed on 2011-10-19 (404 days ago)
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
MachineType: System manufacturer System Product Name
MarkForUpload: True
PackageArchitecture: all
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.5.0-18-generic root=UUID=55041f4b-4e2a-4c3a-9642-c0fa51c76a84 ro quiet splash vt.handoff=7
SourcePackage: compiz
UpgradeStatus: Upgraded to quantal on 2012-10-20 (37 days ago)
dmi.bios.date: 09/14/2011
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 0702
dmi.board.asset.tag: To be filled by O.E.M.
dmi.board.name: P8Z68-V LE
dmi.board.vendor: ASUSTeK Computer INC.
dmi.board.version: Rev X.0x
dmi.chassis.asset.tag: Asset-1234567890
dmi.chassis.type: 3
dmi.chassis.vendor: Chassis Manufacture
dmi.chassis.version: Chassis Version
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr0702:bd09/14/2011:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKComputerINC.:rnP8Z68-VLE:rvrRevX.0x: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 20090808ubuntu36
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.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