QToolButton not displayed correctly on KDE

[David Hurka]

> m_newTabAction->setIcon(QIcon(QLatin1String(":graphics/addtab.png")));

First guess: The Breeze icon engine (which enables color schemes to recolor 
monochrome icons) can not handle Qt ressource paths. Did you try to install 
the image as ordinary file, and use that file as icon?

If that is the problem, a workaround could be to load the ressource through 
QPixmap instead of QIcon.

Or are you sure that the icon is loaded correctly, and just the QToolButton 
does not show it?