AnnotatedTimeLine: date period one month ahead

[Gabriel Sosa]

Hello,

I've been using AnnotatedTimeLine for few days and now I realized that
the date period is being showed a month ahead, like if I show data
from March to May... the result is shown from April to June. Here [1]
is an screenshot of what I'm talking about.

[1] http://img.skitch.com/20100623-djf78c8pth53m4d7wtptn9kekm.jpg

and here is my setup
==========================================
          <script type="text/javascript" src="https://www.google.com/jsapi";></
script>
          <script type="text/javascript">
            google.load('visualization', '1', {packages:
['annotatedtimeline']});
            function drawVisualization() {
              var data = new google.visualization.DataTable();

              data.addRows(517);
              data.addColumn('date', 'Date');
              data.addColumn('number', 'percent: ');

                                /* 0 */ data.setValue(0, 0, new Date(2010, 3, 
29, 3, 40));
data.setValue(0, 1, 80);
                                /* 1 */ data.setValue(1, 0, new Date(2010, 3, 
29, 3, 15));
data.setValue(1, 1, 80);
                                /* 2 */ data.setValue(2, 0, new Date(2010, 3, 
29, 3, 15));
data.setValue(2, 1, 80);
                                /* 3 */ data.setValue(3, 0, new Date(2010, 3, 
30, 3, 15));
data.setValue(3, 1, 80);
                                /* 4 */ data.setValue(4, 0, new Date(2010, 3, 
30, 3, 15));
data.setValue(4, 1, 80);
                               ...........cut..................
                                /* 514 */ data.setValue(514, 0, new Date(2010, 
6, 23, 6, 15));
data.setValue(514, 1, 95);
                                /* 515 */ data.setValue(515, 0, new Date(2010, 
6, 23, 6, 15));
data.setValue(515, 1, 95);
                                /* 516 */ data.setValue(516, 0, new Date(2010, 
6, 23, 6, 15));
data.setValue(516, 1, 60);


              var annotatedtimeline = new
google.visualization.AnnotatedTimeLine(
                  document.getElementById('visualization'));
              annotatedtimeline.draw(data, {'displayAnnotations': true});
            }

            google.setOnLoadCallback(drawVisualization);
          </script>
==========================================
any idea ?

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