Added the missing resize listener to tell the replayer to redraw. This fixes the tooltip offsets.
Updated CustomEvent handling to account for IE, which hasn't caught up with allowing the constructor to be used directly by JavaScript code.
Block handling of mouseup events that correspond to context menus on the progress area so that bringing up the menu doesn't skip the playback to that location. Since the event doesn't indicate that it will cause (or has already caused) a menu to appear, the check is a best guess by blocking mouseups with the control key down or which have the right mouse button down.