New Windows on an empty desktop appear over launcher

[Alan Pope 🍺🐧🐱 🦄]

Binary package hint: compiz

Logon to Unity based desktop (although this probably isnt a Unity bug it's made worse by having Unity running)
Press CTRL+ALT+T to open a terminal
Observe that the terminal window appears near the top left of desktop 1, where the launcher is.

There's acres of space on my desktop (3360x1050), why does it choose _there_ to appear? It's got plenty of options, but actually chooses the least useful place, because the left edge of screen 1 is the only place on the desktop which triggers the launcher to hide. Seems sub-optimal. Screenshot attached.

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: compiz 1:0.9.4-0ubuntu4
ProcVersionSignature: Ubuntu 2.6.38-6.34-generic 2.6.38-rc7
Uname: Linux 2.6.38-6-generic x86_64
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_64 Kernel Module 270.29 Wed Feb 23 16:18:35 PST 2011
 GCC version: gcc version 4.5.2 (Ubuntu/Linaro 4.5.2-6ubuntu1)
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: compiz
CurrentDmesg:
 [ 19.457326] EXT4-fs (sda5): re-mounted. Opts: errors=remount-ro,commit=0
 [ 27.650016] eth0: no IPv6 routers present
 [ 36.430219] EXT4-fs (sda5): re-mounted. Opts: errors=remount-ro,commit=0
Date: Wed Mar 16 19:45:37 2011
DistUpgraded: Log time: 2011-01-19 12:33:17.207056
DistroCodename: natty
DistroVariant: ubuntu
DkmsStatus:
 nvidia-current, 270.29, 2.6.38-5-generic, x86_64: installed
 nvidia-current, 270.29, 2.6.38-6-generic, x86_64: installed
GraphicsCard:
 nVidia Corporation G71 [GeForce 7900 GT/GTO] [10de:0291] (rev a1) (prog-if 00 [VGA controller])
   Subsystem: LeadTek Research Inc. Device [107d:2a62]
InstallationMedia: Ubuntu 10.04.1 LTS "Lucid Lynx" - Release amd64 (20100816.1)
InstallationMedia_: Ubuntu 10.04.1 LTS "Lucid Lynx" - Release amd64 (20100816.1)
JockeyStatus: xorg:nvidia_current - NVIDIA accelerated graphics driver (Proprietary, Enabled, In use)
MachineType: System manufacturer System Product Name
ProcEnviron:
 LANGUAGE=en_GB:en
 PATH=(custom, user)
 LANG=en_GB.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.38-6-generic root=UUID=fb22b4e1-1576-4bf8-8272-15300bc7de38 ro quiet splash vt.handoff=7
ProcVersionSignature_: Ubuntu 2.6.38-6.34-generic 2.6.38-rc7
Renderer: Unknown
SourcePackage: compiz
UpgradeStatus: Upgraded to natty on 2011-01-19 (56 days ago)
dmi.bios.date: 04/24/2009
dmi.bios.vendor: Phoenix Technologies, LTD
dmi.bios.version: ASUS P5N32-E SLI ACPI BIOS Revision 1801
dmi.board.name: P5N32-E SLI
dmi.board.vendor: ASUSTeK Computer INC.
dmi.board.version: 1.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:bvrASUSP5N32-ESLIACPIBIOSRevision1801:bd04/24/2009:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKComputerINC.:rnP5N32-ESLI:rvr1.XX:cvnChassisManufacture:ct3:cvrChassisVersion:
dmi.product.name: System Product Name
dmi.product.version: System Version
dmi.sys.vendor: System manufacturer
version.compiz: compiz 1:0.9.4-0ubuntu4
version.libdrm2: libdrm2 2.4.23-1ubuntu3
version.libgl1-mesa-glx: libgl1-mesa-glx 7.10.1-0ubuntu2
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 1:6.14.0-0ubuntu2
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.14.0-4ubuntu2
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau N/A