[flexcoders] ValueCommit strange behaviour with comboBoxes

[Alberto Albericio]

Hello all,

Whenever I try to change the selectedIndex in a comboBox, if the 
selectedIndex is different from the current selectedIndex, it dispatches 
2 valueCommit events instead of 1!! If I change it to the same index, it 
just dispatches one! :o

Here's an example:

<mx:Application
    xmlns:mx="http://www.adobe.com/2006/mxml"; layout="vertical">
    <mx:Script>
        <![CDATA[
            import mx.collections.ArrayCollection;
            [Bindable]
            private var dp: ArrayCollection = new ArrayCollection( [ 
1,2,3,4 ] );
           
        ]]>
    </mx:Script>
    <mx:Button label="change" click="foo.selectedIndex = 3" />
    <mx:Button label="change2" click="foo.selectedIndex = 1" />
    <mx:ComboBox
        id="foo"
        dataProvider="{ dp }"
        prompt="Hello"
        valueCommit="trace( 'Event ' + event.type )" />
</mx:Application>

Is this a bug??

Thank you in advance

Alberto