I have the same issue on Ubuntu Wily, with quasselclient, a Qt5 application.
The menu shows both in the global app menu and at the top of the window.
When I start using "UBUNTU_MENUPROXY=0 quasselclient", the menu will only show in the window but not the global menu area.
However I'd prefer the opposite, only the global menu showing.
I have the same issue on Ubuntu Wily, with quasselclient, a Qt5 application.
The menu shows both in the global app menu and at the top of the window.
When I start using "UBUNTU_MENUPROXY=0 quasselclient", the menu will only show in the window but not the global menu area.
However I'd prefer the opposite, only the global menu showing.