Broken upgrade to Natty: no Awesome WM because of Compiz/Metacity autostart

Binary package hint: compiz

I use custom Gnome + Awesome desktop.
After upgrade to Natty I was left with wallpaper and mouse only: no gnome panel (I use it together with Awesome), no Awesome.
I found that Compiz has started and is preventing Awesome from starting.

Workaround:
1. sudo mv /usr/share/applications/compiz.desktop /var/tmp
2. Add gnome-panel to autostart

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: compiz 1:0.9.4-0ubuntu4
ProcVersionSignature: Ubuntu 2.6.38-5.32-generic 2.6.38-rc6
Uname: Linux 2.6.38-5-generic x86_64
NonfreeKernelModules: nvidia
.proc.driver.nvidia.gpus.0: Error: [Errno 21] Это каталог: '/proc/driver/nvidia/gpus/0'
.proc.driver.nvidia.registry: Binary: ""
.proc.driver.nvidia.version:
 NVRM version: NVIDIA UNIX x86_64 Kernel Module 270.29 Wed Feb 23 16:18:35 PST 2011
 GCC version: gcc version 4.5.2 (Ubuntu/Linaro 4.5.2-5ubuntu1)
Architecture: amd64
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: None
Date: Tue Mar 8 17:06:40 2011
DistUpgraded: Log time: 2011-03-07 20:43:28.815363
DistroCodename: natty
DistroVariant: ubuntu
DkmsStatus:
 nvidia-current, 270.29, 2.6.38-5-generic, x86_64: installed
 nvidia-current, 270.29, 2.6.37-2.dmz.2-liquorix-amd64, x86_64: installed
 vboxhost, 4.0.4, 2.6.38-5-generic, x86_64: installed
 vboxhost, 4.0.4, 2.6.37-1.dmz.2-liquorix-amd64, x86_64: built
 vboxhost, 4.0.4, 2.6.37-2.dmz.2-liquorix-amd64, x86_64: installed
GraphicsCard: nVidia Corporation G84 [GeForce 8600 GTS] [10de:0400] (rev a1) (prog-if 00 [VGA controller])
InstallationMedia: Ubuntu 10.04 "Lucid Lynx" - Beta amd64 (20100318)
InstallationMedia_: Ubuntu 10.04 "Lucid Lynx" - Beta amd64 (20100318)
MachineType: System manufacturer P5K
PackageArchitecture: all
ProcEnviron:
 LANGUAGE=ru_RU:en
 PATH=(custom, no user)
 LANG=ru_RU.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.38-5-generic root=UUID=6d9aec68-6f5f-45d8-82f1-24b6910a6e82 ro quiet splash vt.handoff=7
ProcVersionSignature_: Ubuntu 2.6.38-5.32-generic 2.6.38-rc6
Renderer: Unknown
SourcePackage: compiz
UpgradeStatus: Upgraded to natty on 2011-03-07 (0 days ago)
dmi.bios.date: 10/30/2007
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 0704
dmi.board.asset.tag: To Be Filled By O.E.M.
dmi.board.name: P5K
dmi.board.vendor: ASUSTeK Computer INC.
dmi.board.version: Rev 1.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.:bvr0704:bd10/30/2007:svnSystemmanufacturer:pnP5K:pvrSystemVersion:rvnASUSTeKComputerINC.:rnP5K:rvrRev1.xx:cvnChassisManufacture:ct3:cvrChassisVersion:
dmi.product.name: P5K
dmi.product.version: System Version
dmi.sys.vendor: System manufacturer
version.compiz: compiz 1:0.9.4-0ubuntu4
version.libdrm2: libdrm2 2.4.23-1ubuntu3
version.libgl1-mesa-glx: libgl1-mesa-glx 7.10.1~git20110215.cc1636b6-0ubuntu2
version.nvidia-graphics-drivers: nvidia-graphics-drivers N/A
version.xserver-xorg: xserver-xorg 1:7.6~3ubuntu11
version.xserver-xorg-video-ati: xserver-xorg-video-ati N/A
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.14.0-4ubuntu1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:0.0.16+git20110107+b795ca6e-0ubuntu5