Have you recently added any applications to the old-style systray whitelist? If yes then this bug is a duplicate of bug #761409 . If not then make sure you are using the latest version of Unity (3.8.10-0ubuntu2) as I cannot reproduce this here.
Have you recently added any applications to the old-style systray whitelist? If yes then this bug is a duplicate of bug #761409 . If not then make sure you are using the latest version of Unity (3.8.10-0ubuntu2) as I cannot reproduce this here.