Application notification icons on top panel are not rendered properly

[Bruno Girin]

Binary package hint: gnome-panel

This bug just appeared on Lucid beta so may be due to a recent update. The application notification icons on the right hand side of the top panel don't display properly. It looks like some icons were initially drawn on too far to the right and were subsequently re-drawn further to the left but the original rendering was not removed. See the attached screenshot for the details.

Steps to reproduce:
1. Log-in to Lucid 10.04 beta
2. Wait for the desktop to appear

Expected behaviour:
All GUI elements of the desktop are rendered properly

Actual behaviour:
The application notification icons on the right of the top panel are not rendered properly (see screenshot)

ProblemType: Bug
DistroRelease: Ubuntu 10.04
Package: gnome-panel 1:2.30.0-0ubuntu1
ProcVersionSignature: Ubuntu 2.6.32-21.32-generic 2.6.32.11+drm33.2
Uname: Linux 2.6.32-21-generic i686
Architecture: i386
Date: Tue Apr 27 15:06:58 2010
InstallationMedia: Ubuntu 10.04 "Lucid Lynx" - Beta i386 (20100406.1)
ProcEnviron:
 PATH=(custom, user)
 LANG=en_GB.utf8
 SHELL=/bin/bash
SourcePackage: gnome-panel

[Bruno Girin (brunogirin)]

Screenshot that demonstrates the problem.

[Bruno Girin (brunogirin)]

Adding regression-potential tag as it was always working fine with Karmic and with previous versions of Lucid and only started appearing today.