Multiple File Input Fields in One Form Jquery upload, not working

Question

I'm trying to implement (without success) a multi file input in a single form with jQuery-File-Upload. The plugin seems to support this behaviour:

Multiple File Input Fields in One Form

I cannot make it work. What's the related javascript to make it work? This is the form in the partial example:

<form id="fileupload" action="php/index.php" method="POST" enctype="multipart/form-data">
    <div class="row">
        <div class="span16 fileupload-buttonbar">
            <div class="progressbar fileupload-progressbar"><div style="width:0%;"></div></div>
            <span class="btn success fileinput-button">
                <span>Add files...</span>
                <input type="file" name="files[]" multiple>
            </span>
            <!-- Extra file input start /-->
            <span class="btn fileinput-button">
                <span>Other...</span>
                <input type="file" name="files2[]" multiple>
            </span>
            <!--/ Extra file input stop -->
            <button type="submit" class="btn primary start">Start upload</button>
            <button type="reset" class="btn info cancel">Cancel upload</button>
            <button type="button" class="btn danger delete">Delete selected</button>
            <input type="checkbox" class="toggle">
        </div>
    </div>
    <br>
    <div class="row">
        <div class="span16">
            <table class="zebra-striped"><tbody class="files"></tbody></table>
        </div>
    </div>
</form>

I have tried to work with the standard implementation of the js:

$(function () {
    $('#fileupload').fileupload({
        dataType: 'json',
        done: function (e, data) {
            $.each(data.result.files, function (index, file) {
                $('<p/>').text(file.name).appendTo(document.body);
            });
        }
    });
});

Does anyone have a complete working example? I simply need to upload groups of files to a php uploader.