RestDataSource request: http header "Accept-Charset" discarded?

[d.cavestro]

Hi all,
I wonder if sending the additional header Accept-Charset is disabled by design on RestDataSource http requests (at least on Firefox 5).
Take for instance a look at the following snippet.

    final RestDataSource mainDataSource = new RestDataSource ();
    mainDataSource.setDataFormat (DSDataFormat.JSON);
    mainDataSource.setDataURL ("data/mainds_fetch.js");
		
    final Map<String, String> headers = new HashMap<String, String> ();
    headers.put ("Accept", "application/json");
    headers.put ("Accept-Charset", "UTF-8");//never sent
    headers.put ("myheader", "foo");
		
    final DSRequest request = new DSRequest ();
    request.setHttpHeaders (headers);
    mainDataSource.setRequestProperties (request);

Calling fetchData on taht data source I noticed the headers configuration only affects the Accept header and myheader, but not Accept-Charset.
Tested with Firefox 5.0 and SmartClient Version: SC_SNAPSHOT-2011-08-02/LGPL Development Only (built 2011-08-02)

Cheers
Davide

[Isomorphic]

It's not something we're doing. Browsers do not allow all HTTP headers to be set from a web application.