Unity launcher interferes with Firefox previous button

I am using Ubuntu 11.10 beta 2.

Near 50% of the time when I want to click the "previous page" button in Firefox (or any other web browser, such as Chrome and Opera) Unity Launcher slides out, which causes me to click on Dash or a launcher application, instead of actually clicking the "previous page" button.

This of course only happens when the web browser is maximized. The "previous page" is too close to the edge of the screen which triggers Unity Launcher to come out.

I find this behaviour annoying, as well as other people using my computer. I don't really experience this with other applications, because their controls have a proper padding applied to controls on the left side of the screen.

ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: unity 4.22.0-0ubuntu3
ProcVersionSignature: Ubuntu 3.0.0-12.20-generic-pae 3.0.4
Uname: Linux 3.0.0-12-generic-pae i686
NonfreeKernelModules: nvidia
.proc.driver.nvidia.gpus.0: Error: [Errno 21] Is een map: '/proc/driver/nvidia/gpus/0'
.proc.driver.nvidia.registry: Binary: ""
.proc.driver.nvidia.version:
 NVRM version: NVIDIA UNIX x86 Kernel Module 280.13 Wed Jul 27 16:55:43 PDT 2011
 GCC version: gcc version 4.6.1 (Ubuntu/Linaro 4.6.1-9ubuntu3)
.tmp.unity.support.test.0:

ApportVersion: 1.23-0ubuntu3
Architecture: i386
CompizPlugins: [core,bailer,detection,composite,opengl,decor,gnomecompat,vpswitch,regex,snap,compiztoolbox,mousepoll,move,animation,place,imgpng,grid,resize,unitymtgrabhandles,wall,expo,fade,ezoom,workarounds,session,scale,unityshell]
CompositorRunning: compiz
Date: Sun Oct 9 18:27:48 2011
DistUpgraded: Fresh install
DistroCodename: oneiric
DistroVariant: ubuntu
GraphicsCard:
 nVidia Corporation G71 [Quadro FX 1500] [10de:029e] (rev a1) (prog-if 00 [VGA controller])
   Subsystem: nVidia Corporation Device [10de:032c]
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Beta i386 (20110911)
MachineType: MICRO-STAR INTERNATIONAL CO.,LTD MS-7597
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.0.0-12-generic-pae root=UUID=ba02753f-ab88-4b8d-8f4e-1de4cc708808 ro quiet splash vt.handoff=7
SourcePackage: unity
UpgradeStatus: No upgrade log present (probably fresh install)
XorgConf:
 Section "Device"
  Identifier "Default Device"
  Option "NoLogo" "True"
 EndSection
dmi.bios.date: 01/04/2011
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: V2.8
dmi.board.asset.tag: To Be Filled By O.E.M.
dmi.board.name: GF615M-P33 (MS-7597)
dmi.board.vendor: MICRO-STAR INTERNATIONAL CO.,LTD
dmi.board.version: 1.0
dmi.chassis.asset.tag: To Be Filled By O.E.M.
dmi.chassis.type: 3
dmi.chassis.vendor: MICRO-STAR INTERNATIONAL CO.,LTD
dmi.chassis.version: 1.0
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrV2.8:bd01/04/2011:svnMICRO-STARINTERNATIONALCO.,LTD:pnMS-7597:pvr1.0:rvnMICRO-STARINTERNATIONALCO.,LTD:rnGF615M-P33(MS-7597):rvr1.0:cvnMICRO-STARINTERNATIONALCO.,LTD:ct3:cvr1.0:
dmi.product.name: MS-7597
dmi.product.version: 1.0
dmi.sys.vendor: MICRO-STAR INTERNATIONAL CO.,LTD
version.compiz: compiz 1:0.9.6+bzr20110929-0ubuntu3
version.libdrm2: libdrm2 2.4.26-1ubuntu1
version.libgl1-mesa-dri: libgl1-mesa-dri 7.11-0ubuntu3
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 7.11-0ubuntu3
version.nvidia-graphics-drivers: nvidia-graphics-drivers N/A
version.xserver-xorg: xserver-xorg 1:7.6+7ubuntu7
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 2:2.15.901-1ubuntu2
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:0.0.16+git20110411+8378443-1