Version: (using KDE 4.4.1) Compiler: GCC 4.4.3 OS: Linux Installed from: Compiled From Sources Very similar to bug #231357: Akregator's icon is shown only on one tray plasmoid and not on all the rest. Dario in his comment on bug #206255 (https://bugs.kde.org/show_bug.cgi?id=206255#c4) said that it is application's problem not using new systray protocol.
This bug has only been reported for versions before 4.14, which have been unsupported for at least two years now. Can anyone tell if this bug still present? If noone confirms this bug for a Framework-based version of akregator (version 5.0 or later, as part of KDE Applications 15.08 or later), it gets closed in about three months.
Just as announced in my last comment, I close this bug. If you encounter it again in a recent version (at least 5.0 aka 15.08), please open a new one unless it already exists. Thank you for all your input.