I browsed the buttons demo for a while, then went to "Panels" demo. The combo box worked fine at first, but after I opened an alert box and closed it, the combo

I browsed the buttons demo for a while, then went to "Panels" demo. The combo box worked fine at first, but after I opened an alert box and closed it, the combo box does not work properly any more. The combo box popup does not appear in the place it should be. Screenshot: http://i.imgur.com/EgRNJ.png http://i.imgur.com/EgRNJ.png am on chrome 10, linux.