Some KDE applications, e.g. Okular or Akregator, have offered the possibility to hide the menubar for a long time (usually via “Tools→Show Menubar”). Now this interferes with Oxygen's ability to put the menubar somewhere else (e.g. into the window's title bar) in a way of which I'm not exactly sure whether it's a bug or a feature.

When the menubar is put into the title bar, it is not _shown_ anyway, so the “show” in “show menubar” is wrong. However, “show menubar” still has an effect: When it is checked, the menus (wherever they are) can be accessed by keyboard shortcuts such as Alt+F for File – otherwise they can't.

This disabling or enabling of keyboard shortcuts is actually a helpful feature in applications that dynamically assign keyboard shortcuts from the Alt+X “namespace”, such as Akregator for its tabs. But the way this “feature” works is far from intuitive.

Still, I have no idea how this could be improved.