Comment 8 for bug 1448512

Skype appears just fine in my system tray on my Kubuntu 15.04 (and it has always worked fine since I updated to 15.10).

Unless I am mistaken, I believe Skype got mentioned a lot in those past discussions because its system tray used not to be compatible with Plasma 5, but it got updated before the release of Kubuntu 15.04.

Pidgin, though, is another widely used Instant Messenger that is affected by this system tray issue.