This is (sadly) by design and is the way menus work in Xorg. The window manager or toolkit you use doesn't matter, when a menu is open it gets every event no matter where your mouse pointer is.
** Changed in: compiz (Ubuntu) Status: New => Invalid ** Changed in: metacity (Ubuntu) Status: New => Invalid -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/794381 Title: scrolling does not work if ANY menu is kept open -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs