I run over the following problem in Ubuntu 14.04:
When I right click, or double click title bar of a nautilus, or at any opened window, or any browser window and so on, it shade and disappear.
In the previous Ubuntu versions (13.10) when a title bar right-click cause the menu to pop-up. Appears a sub-menu with options to move the window around work spaces and few more choices.
Now I can not find this menu, and this option can be reached only with shortcut keys.
I wold be glad to have a hint of that issue.