Version 16.12.1 KDE Frameworks 5.30.0 Qt 5.7.1 (built against 5.7.1) The xcb windowing system Hide menu bar option is not remembered: Settings -> Show Menubar (Ctr+M) (~/.config/kwriterc ShowMenuBar=false) This is remembered once, but on the next start it is changed back to true.
Seems to be fixed in 16.12.2 on KF 5.31.0.