Comment 8 for bug 388205

This is less a fix and more a workaround for those that come here looking for a solution. An applet would be ideal because then you could right click and get further options such as logout or options for that window (always on top, for example)

I use wmctrl (sudo apt-get install wmctrl), a script and a launcher button in the top right hand corner of my panel to create a universal close button (always closes the top window). It also logs out the current user if the desktop is the only active window.

It is one of the first scripts I've ever written, so please improve as required :)