Chromium is running, but not showing in launcher or alt-tab.

The Chromium browser doesn't seem to be detected as running by Unity.

How to reproduce:

1) Install chromium-browser
2) Add it to your launcher
3) Press the Chromium icon in the launcher.
4) Chromium launchers, but the icon keeps pulsing and eventually goes dim.
5) Try alt-tabbing to the chromium window.

This doesn't happen every time, but it happens enough to be annoying.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: unity 5.0.0-0ubuntu1
ProcVersionSignature: Ubuntu 3.2.0-9.16-generic 3.2.1
Uname: Linux 3.2.0-9-generic x86_64
.tmp.unity.support.test.0:

ApportVersion: 1.90-0ubuntu2
Architecture: amd64
CasperVersion: 1.299
CompizPlugins: [core,bailer,detection,composite,opengl,compiztoolbox,decor,gnomecompat,grid,imgpng,mousepoll,move,place,regex,resize,session,snap,vpswitch,wall,animation,expo,ezoom,fade,scale,unityshell,workarounds]
CompositorRunning: compiz
Date: Thu Jan 19 00:23:08 2012
DistUpgraded: Fresh install
DistroCodename: precise
DistroVariant: ubuntu
GraphicsCard:
 nVidia Corporation G86 [GeForce 8400M GS] [10de:0427] (rev a1) (prog-if 00 [VGA controller])
   Subsystem: Hewlett-Packard Company Device [103c:30cd]
LiveMediaBuild: Ubuntu 12.04 LTS "Precise Pangolin" - Alpha amd64 (20120118)
MachineType: Hewlett-Packard Pavilion dv2817ca (KP044UA#ABC)
ProcEnviron:
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: initrd=/ubninit file=/cdrom/preseed/hostname.seed boot=casper quiet splash -- BOOT_IMAGE=/ubnkern
SourcePackage: unity
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 08/26/2008
dmi.bios.vendor: Phoenix
dmi.bios.version: F.2D
dmi.board.name: 30CE
dmi.board.vendor: Wistron
dmi.board.version: 80.52
dmi.chassis.type: 10
dmi.chassis.vendor: Hewlett-Packard
dmi.chassis.version: N/A
dmi.modalias: dmi:bvnPhoenix:bvrF.2D:bd08/26/2008:svnHewlett-Packard:pnPaviliondv2817ca(KP044UA#ABC):pvrF.2D:rvnWistron:rn30CE:rvr80.52:cvnHewlett-Packard:ct10:cvrN/A:
dmi.product.name: Pavilion dv2817ca (KP044UA#ABC)
dmi.product.version: F.2D
dmi.sys.vendor: Hewlett-Packard
version.compiz: compiz 1:0.9.6+bzr20110929-0ubuntu8
version.ia32-libs: ia32-libs 20090808ubuntu33
version.libdrm2: libdrm2 2.4.30-1ubuntu1
version.libgl1-mesa-dri: libgl1-mesa-dri 7.11-0ubuntu4
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 7.11-0ubuntu4
version.xserver-xorg-core: xserver-xorg-core 2:1.10.4-1ubuntu6
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.6.0-1ubuntu13
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.14.99~git20110811.g93fc084-0ubuntu1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.15.901-1ubuntu4
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:0.0.16+git20111201+b5534a1-1