I'm running Kubuntu 16.04 64-bit. Muon Package Manager (Version 5.4.2, using KDE Frameworks 5.15.0; Qt 5.5.1 (built against 5.4.2); The xcb windowing system). Neither the X in the upper-right corner nor Alt+F4 will close the application. File > Quit or Ctrl+Q do.
Anyone using 16.04 seeing this as well?
Anyone using 16.04 seeing this as well?