Qt Tray does not work under Unity

Using QSystemTray of Qt under Unity does not work.
Created trays are not displayed properly in the panel.

Please fix this. It is annoying because many Qt programs in the repositories do use the tray.

There is also a Qt bugreport containing this issue:

https://bugreports.qt-project.org/browse/QTBUG-24085?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel#issue-tabs

But it's obvious that it is a problem of Ubuntu, not the Qt Framework.

Link to example program using Qt tray: https://bugreports.qt-project.org/secure/attachment/27194/SysTrayMinimal.zip

ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: sni-qt (not installed)
ProcVersionSignature: Ubuntu 3.0.0-16.28-generic 3.0.17
Uname: Linux 3.0.0-16-generic x86_64
ApportVersion: 1.23-0ubuntu4
Architecture: amd64
CheckboxSubmission: e365c216dd18d077874c47f2f6726702
CheckboxSystem: bb422ca46d02494cdbc459927a98bc2f
Date: Mon Feb 20 00:08:30 2012
EcryptfsInUse: Yes
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
SourcePackage: sni-qt
UpgradeStatus: No upgrade log present (probably fresh install)