Bug : focus doesn't get back from popup.

please see this sample

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<window title="My First Window" border="normal" width="500px">
<toolbarbutton label="step 1-click here to show pop" popup="popme"/>
<popup id="popme">hellow<textbox value="step 2-click here to focus this popup." width="300px"/></popup>
<textbox value="step 3-click here to test whether the focus get back." onFocus="self.select();" width="400px"/>
</window>

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after popup get focus, if you click a textbox outof the popup, the focus dosen't come back(to speek exactly, the onFocus event of the textbox is not fired), you had to click it for a second time.