Contextual menu keyboard button can create important display bugs in almost all ubuntu applications

[John Doe]

Most applications handle a right click event, and react to that by providing a contextual menu. They usually handle a second right click by making the menu disappear.
Moreover, some keyboards provide a 'contextual menu' key, which acts as a right click.
However, when you press this key a second time on many ubuntu applications (unity, file manager, gedit, just to name of few, but it's probably an underlying problem), the first contextual menu doesn't disappear, and instead a new one appear, which has the very nasty side effect of filling the screen with contextual menus if the key accidentally gets pressed too long - and sometimes with no other solution than to quit the application to make them all disappear.