We have an application that uses a RadEditor on a RadWindow to allow our users to edit HTML content, which works perfectly in IE (versions 7 and above tested) but not Firefox (various 3.x versions tested). In IE, if the content extends beyond the viewable RadEditor content area in any of the 3 modes (Design, HTML, or Preview), a vertical scrollbar appears. In FF, if the content extends beyond the viewable RadEditor content area, a vertical scrollbar appears in HTML mode but not in Design or Preview mode. Any thoughts on why this might happen and how to correct it? Please see the attached images to see the different views in FF and how they appear versus the screenshot of the same popup window in IE.