Is this a PlotChart+CategoryAxis bug?

Question

The following code unexpectedly produces a vertical line that passes through the first data point - anyone knows why?
<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml">
    <mx:Script>
    <![CDATA[
        import mx.collections.ArrayCollection;
        [Bindable]
        private var stockDataAC:ArrayCollection = new ArrayCollection( [
            { Date: "25-Jul", Open: 40.55,  High: 40.75, Low: 40.24, Close:40.31},                     
            { Date: "5-Aug", Open: 36.61,  High: 37, Low: 36.48, Close:36.86} ]);
    ]]>
    </mx:Script>
    <!-- UI Section -->
    <mx:Panel title="My First Dynamic Chart">
        <mx:PlotChart dataProvider="{stockDataAC}" showDataTips="true" >
            <!-- Define the axes -->
            <mx:horizontalAxis>
                <mx:CategoryAxis
                    categoryField="Open"/>
            </mx:horizontalAxis>
            <!-- Define the series -->
            <mx:series>
                <mx:PlotSeries
                    displayName="Series 1"
                    xField="Open"
                    yField="Close">
                </mx:PlotSeries>
            </mx:series>
        </mx:PlotChart>
    </mx:Panel>
</mx:Application>

Answer 1

Well spotted, Pedro. I must admit that I don't have a problem with the search field appearing on both the Summary and the Archive pages, but I hadn't realised until you pointed it out that it can't be deleted selectively from one only. In all fairness, though, I find the .Mac Blog genuinely helpful, and it contains quite a few useful entries which relate to iWeb. They do have a Feedback link, and I'm sure they'd welcome comments about this.
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