Created attachment 112195 [details] screenshot I don't know the correct product/component, re-assign please. increase your display scaling factor in system settings > display and monitor > "scale display" button restart plasma session open ksysguard, "help" menu, "switch app language" item, choose another language and click "ok" You get a warning showing fuzzy icons. See screenshot.
plasma 5.12.4 on Arch Linux.
I think that's just ksysguard not supporting high dpi pixmaps, the window icons in the process list are also probably somewhat pixelated.
You are right. Icons look good when Dolphin shows the same warning.
Created attachment 118652 [details] shortcuts settings window "ok" and "cancel" buttons and ">" are pixelated in shortcuts settings window
Fixed on Plasma 5.17 beta. Operating System: Arch Linux KDE Plasma Version: 5.16.90 KDE Frameworks Version: 5.62.0 Qt Version: 5.13.1