The new Kde Plasma 5 desktop dropped the xembbed system tray support. See: http://blog.martin-graesslin.com/blog/2014/03/system-tray-in-plasma-next/
Therefore task coach is not able to show a icon in the task tray anymore. It would be great if you could update task coach, so it can show an icon again.
I can confirm this bug.
Plasma 5.4.2
TaskCoach Version 1.5.0, January 31, 2016
Error message:
Task Coach does not work correctly with wx3, and probably never will since I'm rewriting the UI stuff to use Qt. Takes some time though.
Hi, it's many years later, and I'm excited to tell you that https://github.com/taskcoach/taskcoach now has updated Python3 Task Coach codebase! Packages are available for some common Linux systems and we can add more.
We'd love to have you test the updated program
I'm using KDE (6 now here in the distant future!), and it's working great. Also, any issues that arise should be fixable now that development is restarted!
Cheers