When I am dragging the scroll bar up or down to scroll through an email pane in Outlook 2010, the email list doesn't redraw until I let go of the scroll bar. However, if I am using the mouse wheel to scroll, the list updates on every scroll.
In working with certain WPF controls that exhibit this same behavior, I am theorizing that Outlook does this to be "more efficient". However, I'd sometimes rather sacrifice efficiency for convenience, so I'd much rather have the email pane scroll much in the same way that an HTML page scrolls when dragging the scroll bar. In WPF, you can disable this redraw-on-release behavior for controls that implement this behavior, so I am wondering if Microsoft gave us a way to do the same for email panes.