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In Ubuntu 13.04 there is no Tray Icon and Whiteliting is removed.
I Installed Gnome 3.8 but there is no tray there too!!
How can I get tray icons back (for applications that put icon in tray like Vuze,Truecrypt,... & have no Indicator) in Unity ?
e.g. a wrapper App Indicator that show old applications icons?

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Seth's answer does actually work, although in my case it needed an "apt-get install update" and "apt-get install upgrade" to prevent the "No such schema"-error. – user164089 Jun 3 '13 at 12:07
up vote 6 down vote accepted

Just read about this today in this article How To Get The Sysray Whitelist Back in Ubuntu 13.04.
Hope that helps you out!

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Thank you very much; – RYN May 11 '13 at 8:26

If that's what you want, I think the code below solves the problem:

gsettings set com.canonical.Unity.Panel systray-whitelist "['all']"
share|improve this answer
Unfortunately whitelisting is removed in Ubuntu 13.04 !! that command gives No such schema 'com.canonical.Unity.Panel' – RYN May 10 '13 at 20:32

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