Unity Launcher does not hide

Binary package hint: unity

It seems that chromium can trigger this bug: either unity (in compiz settings) is set to "dodge windows" or "autohide" it works fine until I switch a workspace where maximized (not full screen, just maximized) chromium window can be seen. After that it won't disappear even if it overlaps the chromium window, also if I switch to another workspace, it won't go away ever. If I click on chromium's maximize window button to un-maxmize it works again (even if I re-maximize it again) but another workspace switch away and back triggers the problem again.

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: unity 3.8.8-0ubuntu2
ProcVersionSignature: Ubuntu 2.6.38-8.42-generic 2.6.38.2
Uname: Linux 2.6.38-8-generic i686
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 Kernel Module 270.41.03 Sat Apr 9 00:04:57 PDT 2011
 GCC version: gcc version 4.5.2 (Ubuntu/Linaro 4.5.2-8ubuntu3)
Architecture: i386
CompizPlugins: [core,bailer,detection,composite,opengl,decor,mousepoll,vpswitch,regex,animation,snap,expo,move,compiztoolbox,place,grid,imgpng,gnomecompat,wall,ezoom,workarounds,staticswitcher,resize,fade,unitymtgrabhandles,scale,session,unityshell]
CompositorRunning: compiz
Date: Mon Apr 18 08:16:58 2011
DistUpgraded: Log time: 2010-09-12 13:58:25.192945
DistroCodename: natty
DistroVariant: ubuntu
DkmsStatus:
 vboxhost, 4.0.4, 2.6.35-28-generic, i686: installed
 vboxhost, 4.0.4, 2.6.38-8-generic, i686: installed
 vboxhost, 4.0.4, 2.6.35-27-generic, i686: installed
 nvidia-current, 270.41.03, 2.6.35-28-generic, i686: installed
 nvidia-current, 270.41.03, 2.6.38-8-generic, i686: installed
EcryptfsInUse: Yes
GraphicsCard:
 nVidia Corporation NV43 [GeForce 6200] [10de:014f] (rev a2) (prog-if 00 [VGA controller])
   Subsystem: ASUSTeK Computer Inc. Device [1043:819e]
JockeyStatus: xorg:nvidia_current - NVIDIA accelerated graphics driver (Proprietary, Enabled, In use)
Lsusb:
 Bus 002 Device 004: ID 04d9:1503 Holtek Semiconductor, Inc. Shortboard Lefty
 Bus 002 Device 003: ID 045e:0039 Microsoft Corp. IntelliMouse Optical
 Bus 002 Device 002: ID 046d:08da Logitech, Inc. QuickCam Messanger
 Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
 Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
MachineType: System manufacturer System Product Name
ProcEnviron:
 LANGUAGE=en_US:en
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.38-8-generic root=UUID=a5601479-5c0c-426e-931b-fe8ab0d82b50 ro splash quiet vt.handoff=7
ProcVersionSignature_: Ubuntu 2.6.38-8.42-generic 2.6.38.2
ProcVersionSignature__: Ubuntu 2.6.38-8.42-generic 2.6.38.2
Renderer: Unknown
SourcePackage: unity
UpgradeStatus: Upgraded to natty on 2010-09-12 (217 days ago)
dmi.bios.date: 06/08/2005
dmi.bios.vendor: Phoenix Technologies, LTD
dmi.bios.version: ASUS A8N-E ACPI BIOS Revision 1005
dmi.board.name: A8N-E
dmi.board.vendor: ASUSTeK Computer INC.
dmi.board.version: 2.XX
dmi.chassis.asset.tag: 123456789000
dmi.chassis.type: 3
dmi.chassis.vendor: Chassis Manufacture
dmi.chassis.version: Chassis Version
dmi.modalias: dmi:bvnPhoenixTechnologies,LTD:bvrASUSA8N-EACPIBIOSRevision1005:bd06/08/2005:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKComputerINC.:rnA8N-E:rvr2.XX:cvnChassisManufacture:ct3:cvrChassisVersion:
dmi.product.name: System Product Name
dmi.product.version: System Version
dmi.sys.vendor: System manufacturer
version.compiz: compiz 1:0.9.4+bzr20110415-0ubuntu1
version.libdrm2: libdrm2 2.4.23-1ubuntu6
version.libgl1-mesa-dri: libgl1-mesa-dri 7.10.2-0ubuntu1
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 7.10.2-0ubuntu1
version.nvidia-graphics-drivers: nvidia-graphics-drivers N/A
version.xserver-xorg: xserver-xorg 1:7.6+4ubuntu3
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.14.0-0ubuntu4
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.14.0-4ubuntu7
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:0.0.16+git20110107+b795ca6e-0ubuntu7