'random pixel line' on top of unity-2d-panel

[Minimec]

Using the unity-2d-panel on a Toshiba ac100 ARM device , there is 1x pixel line with random pixels on top of the panel application.

These pixels are influenced (provoked) by the 'indicator menus' and global-menu. So using two different applications with global menu will influence the pixels, displayed on top of unity-2d-panel.

If you use an application in full screen mode (F11), these pixels are gone, as F11 overlaps the unity-2d-panel.

I added a Screenshot as attachment.

ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: unity-2d-panel 4.6.1-0ubuntu1
Uname: Linux 2.6.38-1-ac100 armv7l
ApportVersion: 1.22.1-0ubuntu2
Architecture: armel
Date: Wed Sep 14 15:41:26 2011
ProcEnviron:
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: unity-2d
UpgradeStatus: No upgrade log present (probably fresh install)