Restoring dash size shows black area around

[Lucas Capalbo Lavezzo]

up-to-date Ubuntu 12.04, 3.2.0-26-generic 64 bits linux kernel, Unity 3D desktop, nvidia proprietary drivers -post release-

Unity 5.12-0ubuntu1.1
compiz 1:0.9.7.8-0ubuntu1

Steps to reproduce
1) Click the BFB to open de dash
2) click restore button to unmaximize the dash if it is maximized, or double click to maximize-restore

Expected:
the dash is unmaximized, the wallpaper/others windows opened can be viewed normally to the right of the dash and under it

What happened instead:
the dash is display unmaximized, with its border and shadow. However the rest of the screen (to the right and under the dash) is shown black.
moving the mouse over some of the icons in the dash/section tittles or typing some text redraws the screen and solves the problem

Screenshot attached
This only happen in Unity 3D, Unity 2D works ok. I think the problem appeared after the last Unity update, but can't confirm

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: unity 5.12-0ubuntu1.1
ProcVersionSignature: Ubuntu 3.2.0-26.41-generic 3.2.19
Uname: Linux 3.2.0-26-generic x86_64
NonfreeKernelModules: nvidia
.proc.driver.nvidia.gpus.0: Error: [Errno 21] Es un directorio: '/proc/driver/nvidia/gpus/0'
.proc.driver.nvidia.registry: Binary: ""
.proc.driver.nvidia.version:
 NVRM version: NVIDIA UNIX x86_64 Kernel Module 295.49 Mon Apr 30 23:46:33 PDT 2012
 GCC version: gcc versión 4.6.3 (Ubuntu/Linaro 4.6.3-1ubuntu5)
.tmp.unity.support.test.0:

ApportVersion: 2.0.1-0ubuntu8
Architecture: amd64
CheckboxSubmission: b23fd1eb547d2c30cac0498050917734
CheckboxSystem: edda5d4f616ca792bf437989cb597002
CompizPlugins: [core,composite,opengl,decor,imgpng,imgsvg,imgjpeg,compiztoolbox,place,session,vpswitch,mousepoll,regex,text,grid,resize,move,gnomecompat,wall,obs,animation,wobbly,workarounds,expo,fade,ezoom,scale,scaleaddon,unityshell]
CompositorRunning: compiz
Date: Mon Jul 2 12:26:48 2012
DistUpgraded: Fresh install
DistroCodename: precise
DistroVariant: ubuntu
DkmsStatus:
 nvidia-current, 295.40, 3.2.0-25-generic, x86_64: installed
 nvidia-current, 295.40, 3.2.0-26-generic, x86_64: installed
 nvidia-current-updates, 295.49, 3.2.0-25-generic, x86_64: installed
 nvidia-current-updates, 295.49, 3.2.0-26-generic, x86_64: installed
 vboxhost, 4.1.18, 3.2.0-26-generic, x86_64: installed
GraphicsCard:
 NVIDIA Corporation C68 [GeForce 7050 PV / nForce 630a] [10de:053b] (rev a2) (prog-if 00 [VGA controller])
   Subsystem: ASUSTeK Computer Inc. Device [1043:82b3]
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425)
JockeyStatus:
 xorg:nvidia_current - Controlador de aceleración gráfica para tarjetas NVIDIA (Privativo, Desactivado, No está en uso)
 xorg:nvidia_current_updates - Controlador de gráficos acelerados de NVIDIA (actualizaciones post-lanzamiento) (Privativo, Activado, En uso)
MachineType: System manufacturer System Product Name
ProcEnviron:
 LANGUAGE=es_AR:es
 TERM=xterm
 PATH=(custom, no user)
 LANG=es_AR.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-26-generic root=UUID=52d0d3cf-a16b-42b9-a50e-3f9446f2138c ro quiet splash vga=792 vt.handoff=7 vt.handoff=7
SourcePackage: unity
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 12/19/2008
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 0905
dmi.board.asset.tag: To Be Filled By O.E.M.
dmi.board.name: M2N-VM DVI
dmi.board.vendor: ASUSTeK Computer INC.
dmi.board.version: Rev x.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.:bvr0905:bd12/19/2008:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKComputerINC.:rnM2N-VMDVI:rvrRevx.xx:cvnChassisManufacture:ct3:cvrChassisVersion:
dmi.product.name: System Product Name
dmi.product.version: System Version
dmi.sys.vendor: System manufacturer
version.compiz: compiz 1:0.9.7.8-0ubuntu1
version.ia32-libs: ia32-libs 20090808ubuntu36
version.libdrm2: libdrm2 2.4.32-1ubuntu1
version.libgl1-mesa-dri: libgl1-mesa-dri 8.0.2-0ubuntu3.1
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 8.0.2-0ubuntu3.1
version.nvidia-graphics-drivers: nvidia-graphics-drivers N/A
version.xserver-xorg-core: xserver-xorg-core 2:1.11.4-0ubuntu10.2
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.7.0-0ubuntu1.2
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.14.99~git20111219.aacbd629-0ubuntu2
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.17.0-1ubuntu4
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:0.0.16+git20111201+b5534a1-1build2

[Daniel van Vugt (vanvugt)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. This particular bug has already been reported and is a duplicate of bug 992516, so it is being marked as such. Please look at the other bug report to see if there is any missing information that you can provide, or to see if there is a workaround for the bug. Additionally, any further discussion regarding the bug should occur in the other report. Feel free to continue to report any other bugs you may find.