I have a blank entry that appears in system tray. I am able to hide it. This used to not exist, so I don't know if I have a rogue application that's trying to implement it's tray icon or what. Reproducible: Sometimes Steps to Reproduce: 1. Open System Tray Settings 2. Notice that blank entry is present 3. Can change visibility from "Auto" to "Hidden" and vice versa Actual Results: Blank tray icon is present. Expected Results: Blank tray icon is non-existent. Again, this used to not be an issue. If I had a rought estimate of when it started happening, I would say it was around when I installed Pidgin.
*** This bug has been marked as a duplicate of bug 359139 ***