== Question about screenshot copyright == 

 I see you have changed some license tags in some screenshots I have uploaded. Since I've always been confused by the licence of screenshots, I'd like to ask you a couple of questions. All these screenshots are of the X Window system, using a X window manager; some programs are mine. If a screenshot includes elements that are effectively added by the window manager (such as the title bar, the frame around windows, etc.), do I have to include the window manager license? If I instead decide to release the programs in the public domain, do I still have to include that license?