Noticed a small bug (difference?) from the Windows 7 taskbar on the DF taskbar.

If you open the DF preview, then hover over one of the previews so the preview is in the highlight box and the red X shows, then quickly mouse to a blank area of the DF taskbar, the preview doesn't close until you leave the taskbar.

Not hovering over (selecting) the preview or doing the all the steps on the Windows 7 taskbar causes the preview (with a nice fade up animation for Windows 7) to close after a few seconds outside the preview box.