I've reproduced this using libreoffice. I wasn't able to repro the issue in programs using just standard gtk menus.
I reproduced it with compiz turned off in plain gnome classic (i.e. gnome-panel), so I'm doubting it's the window manager. The issue is likely in whatever toolkit libreoffice uses. ** Package changed: xorg (Ubuntu) => libreoffice (Ubuntu) ** Changed in: libreoffice (Ubuntu) Status: Incomplete => New -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xorg in Ubuntu. https://bugs.launchpad.net/bugs/974900 Title: Menus split across multi monitors To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/libreoffice/+bug/974900/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp