Created attachment 182835 [details] Invisible icon on focussed (raised) button in Kate's Find&Replace panel In many applications the icons on buttons become invisible (or very hard to see) when the button gets focus. See for example the two screenshots showing tool (?) buttons in Kate's Find&Replace panel. I think the problem is that Breeze uses the selected state for painting the icon so that KIconLoader recolors the icon with the highlight text color (white) which is wrong for buttons because selected buttons are not colored with the highlight color.
Created attachment 182836 [details] Hard to see icon on focussed (pressed) button in Kate's Find&Replace panel
The problem doesn't occur with the Fusion style (likely because QCommonStyle never passes QIcon::Selected to the icon drawing).