Hello Linux Geeksters.
As you may know, the Unity notification area systray whitelist is not available by default on Ubuntu 13.04.
Java and Wine are two applications that are hard-coded to appear in the notification area, but popular apps like Truecrypt, Pidgin or Cryptkeeper don’t appear. So, if you want to be able to whitelist apps again, to use the systray, this is how you restore the systray whitelist in Ubuntu 13.04 Raring Ringtail:
How to restore the systray whitelist in Ubuntu 13.04 Raring Ringtail:
Add the repository:
$ sudo add-apt-repository ppa:timekiller/unity-systrayfix
Update the local repository index:
$ sudo apt-get update
$ sudo apt-get upgrade
This will upgrade Unity with a re-patched version having the systray whitelist usable. To re-add the systray whitelist, open Dconf Editor, go to com > canonical > unity > panel and your should see “systray-whitelist” displayed, and ready for enabling.