I am running Ubuntu 12.04. I recently had to do a big fix to my system. Here's the thread if you want to read about it: http://ubuntuforums.org/showthread.php?t=2184595

Everything seemed back to normal, but I went to add an applet. I think that's what they're called, the small buttons on the top bar for email, battery, volume etc. Anyway, I went to add an applet for the trash and I found that when I right click on the bar like I used to to edit the applets, nothing happens. There's no error or weird message or anything, just nothing happens.

Hopefully someone can help me out, let me know if you need more info.