indicator applets flash white when leaving

Binary package hint: unity

When clicking away from an indicator the area where the previous indicator was sometimes flashes white. This is especially noticeable with the network manager as it is large. It is also noticeable when scrubbing over the indicators (click one, then move the mouse over the others).

This also happens with the menu-bar but a lot less often.

Steps to reproduce:
Select a window with a dark background such as the gnome-terminal and maximize it such that the dark background is directly below the panel (this makes it easier to see, it isn't a requirement). Click the file menu and move the mouse right all the way to the power indicator. Move the mouse back and forth over the indicators and menu items. Observe that you sometimes see a white flash.

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: unity 3.2.12-0ubuntu1
ProcVersionSignature: Ubuntu 2.6.37-12.26-generic 2.6.37
Uname: Linux 2.6.37-12-generic i686
Architecture: i386
DRM.card0.LVDS.1:
 status: connected
 enabled: enabled
 dpms: On
 modes: 1024x600
 edid-base64: AP///////wAGr8IRAAAAAAESAQOQFAt4CvpWklZUmCQaT1QAAAABAQEBAQEBAQEBAQEBAQEB7BMASEFYHCAYiDEAw3EAAAAa7BMASEFYHCAYiDEAw3EAAAAaAAAA/gBSODIwR4BCMDg5QVcxAAAAAAAAAAAAAAAAAAEBCiAgAAI=
DRM.card0.VGA.1:
 status: disconnected
 enabled: disabled
 dpms: Off
 modes:
 edid-base64:
Date: Sat Jan 15 00:41:56 2011
DistUpgraded: Yes, recently upgraded Log time: 2010-12-16 18:24:46.567649
DistroCodename: natty
DistroVariant: ubuntu
DkmsStatus:

GraphicsCard:
 Subsystem: Dell Device [1028:02b0]
   Subsystem: Dell Device [1028:02b0]
InstallationMedia: Ubuntu-Netbook 10.10 "Maverick Meerkat" - Release i386 (20101007)
InstallationMedia_: Ubuntu-Netbook 10.10 "Maverick Meerkat" - Release i386 (20101007)
MachineType: Dell Inc. Inspiron 910
ProcEnviron:
 LANGUAGE=en_GB:en
 LANG=en_GB.UTF-8
 LC_MESSAGES=en_GB.utf8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.37-12-generic root=UUID=df85ad50-8bce-4b28-aba7-36aedea7b6f9 ro vt.handoff=7 quiet splash
ProcVersionSignature_: Ubuntu 2.6.37-12.26-generic 2.6.37
SourcePackage: unity
UnitySupportTest:

dmi.bios.date: 08/05/2008
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A00
dmi.board.name: CN0J14
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.chassis.version: A00
dmi.modalias: dmi:bvnDellInc.:bvrA00:bd08/05/2008:svnDellInc.:pnInspiron910:pvrA00:rvnDellInc.:rnCN0J14:rvrA00:cvnDellInc.:ct8:cvrA00:
dmi.product.name: Inspiron 910
dmi.product.version: A00
dmi.sys.vendor: Dell Inc.
version.libdrm2: libdrm2 2.4.22-2ubuntu1
version.libgl1-mesa-glx: libgl1-mesa-glx 7.9+repack-1ubuntu3
version.xserver-xorg: xserver-xorg 1:7.5+6ubuntu7
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.13.2-1ubuntu2
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.13.901-2ubuntu2
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:0.0.16+git20100805+b96170a-0ubuntu1