I've noticed after a fresh install of Linux 15.04 today that the lower option is no longer working. I really need this.
I've tried dconf-editor -> org -> gnome -> desktop -> wm -> preferences -> action-middle-click-titlebar but the "lower" option does not appear even though it is in the description.
Anyone have any suggestions. This is like the number one things I like for Ubuntu because it makes working so much faster not having to find my windows. I'm so frustrated already not being able to push my windows back.
Looking forward to any suggestions.