Yep. Use the correct character encoding.
You are serving your webpages with no or an other encoding specified, than you used for editing the page. In your case you probably want to set the encoding to UTF8, as you are using non-standard codes.
Test this: In your browser (No clue which you have) look for 'character encoding' (Possibly under the view menu) and change it to the diferent encodings, and see how the page is shown.
You cannot ask your user to do this pbviously, so, as part of valid (x)html you should specify the ENCODING keyword.