Comment 32 for bug 613119

I experience the same problem in Kubuntu 11.04 (KDE 4.6.2).
There is a Window Menubar Widget which adds the same Mac-OS-like menu style as in Unity. It most likely has the same root, but I'm not sure.
Here is are some details on the widget http://agateau.wordpress.com/2010/05/10/getting-menus-out-of-application-windows/