Rotate: switching to a workspace with open window causes white line below window deco

Only affects rotate/cube

Test case:
With rotate, cube enabled, best seen with ambiance theme

Open a nautilus, firefox or any window that has dark toolbar
Switch to another Ws, then switch back to workspace with open above window
There will be a whiteish line between deco & toolbar, it disappears after ws is fully loaded

Seems to be related to OpenGl > texture filter on either the default of "Good" or "Best" options
Seen on both a nvidia (nouveau driver) & intel 4000

Workaround: set texture filter to "Fast", then no line appears

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: compiz-plugins 1:0.9.10+13.10.20131011-0ubuntu1
ProcVersionSignature: Ubuntu 3.12.0-2.7-generic 3.12.0
Uname: Linux 3.12.0-2-generic x86_64
.tmp.unity.support.test.0:

ApportVersion: 2.12.6-0ubuntu1
Architecture: amd64
CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
CompositorRunning: compiz
CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0'
CompositorUnredirectFSW: true
CurrentDmesg:
 [ 23.692001] ACPI Warning: \_SB_.PCI0.PEG0.PEGP._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20130725/nsarguments-95)
 [ 23.692172] ACPI Warning: \_SB_.PCI0.PEG0.PEGP._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20130725/nsarguments-95)
 [ 40.634900] ACPI Warning: \_SB_.PCI0.PEG0.PEGP._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20130725/nsarguments-95)
 [ 40.635014] ACPI Warning: \_SB_.PCI0.PEG0.PEGP._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20130725/nsarguments-95)
 [ 75.351637] systemd-hostnamed[2357]: Warning: nss-myhostname is not installed. Changing the local hostname might make it unresolveable. Please install nss-myhostname!
Date: Sun Nov 17 15:51:36 2013
DistUpgraded: Fresh install
DistroCodename: trusty
DistroVariant: ubuntu
GraphicsCard:
 Intel Corporation 3rd Gen Core processor Graphics Controller [8086:0166] (rev 09) (prog-if 00 [VGA controller])
   Subsystem: Lenovo Device [17aa:3977]
 NVIDIA Corporation GK107M [GeForce GTX 660M] [10de:0fd4] (rev a1) (prog-if 00 [VGA controller])
   Subsystem: Lenovo Device [17aa:3977]
InstallationDate: Installed on 2013-11-17 (0 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Alpha amd64 (20131115)
MachineType: LENOVO 2099
MarkForUpload: True
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.12.0-2-generic root=UUID=4e8ccc21-e997-457f-8021-d0faf84f94f7 ro quiet splash vt.handoff=7
SourcePackage: compiz
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 10/10/2012
dmi.bios.vendor: LENOVO
dmi.bios.version: 5DCN40WW(V2.07)
dmi.board.asset.tag: No Asset Tag
dmi.board.name: Product Name
dmi.board.vendor: LENOVO
dmi.board.version: Mainboard version
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Lenovo IdeaPad Y580
dmi.modalias: dmi:bvnLENOVO:bvr5DCN40WW(V2.07):bd10/10/2012:svnLENOVO:pn2099:pvrLenovoIdeaPadY580:rvnLENOVO:rnProductName:rvrMainboardversion:cvnLENOVO:ct10:cvrLenovoIdeaPadY580:
dmi.product.name: 2099
dmi.product.version: Lenovo IdeaPad Y580
dmi.sys.vendor: LENOVO
version.compiz: compiz 1:0.9.10+13.10.20131011-0ubuntu1
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.46-4
version.libgl1-mesa-dri: libgl1-mesa-dri 9.2.2-1ubuntu1
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 9.2.2-1ubuntu1
version.xserver-xorg-core: xserver-xorg-core 2:1.14.3-3ubuntu4
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.7.3-0ubuntu3.1
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.2.0-0ubuntu10
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.904-0ubuntu2
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.10-1ubuntu1
xserver.bootTime: Sun Nov 17 15:47:46 2013
xserver.configfile: default
xserver.errors:
 Failed to load module "nvidia" (module does not exist, 0)
 Failed to load module "nvidia" (module does not exist, 0)
 NOUVEAU(G0): [XvMC] Failed to initialize extension.
xserver.logfile: /var/log/Xorg.0.log
xserver.outputs:
 product id 489
 vendor LGD
xserver.version: 2:1.14.3-3ubuntu4