encoding riddle ISO-8859-1

[Stefan Lindner]

I Use wicket 1.3M3.I want to use the ISO-8859-1 encoding for my pages so I
- Have all Java files and all HTML files use ISO-8859-1 encoding.
- All HTML files start with
             <?xml version="1.0" encoding="ISO-8859-1"?>
  and have
                <head>
                        <meta http-equiv="Content-Type" content="text/html; 
charset=ISO-8859-1"/>
                </head>
- Application.init calls 
getMarkupSettings().setDefaultMarkupEncoding("ISO-8859-1");

When I deploy my application and look at the source code of a esipayed html 
page it reads
             <?xml version="1.0" encoding="UTF-8"?>
                <head>
                        <meta http-equiv="Content-Type" content="text/html; 
charset=ISO-8859-1"/>
                </head>
 
Where does the UTF-8 come from?

Stefan