phranque - 1:34 pm on Sep 17, 2012 (gmt 0)
you should use something like the Live HTTP Headers add-on for Firefox.
this will show you the HTTP Response headers that are returned with the document by the server.
in this case the Content-Type header is relevant and you should look for a header that looks like:
Content-Type: text/html; charset=UTF-8
as far as your offline problem, you need to change the default encoding in your browser.
it should be something like:
Tools/Options/Content/Fonts & Colors - Advanced.../Default Character Encoding/Unicode (UTF-8)
that will solve the problem for your browser but the general solution is the meta http-equiv content-type element.