Ferrari continue tiny adjustements to barge boards
Although not spectacular, Ferrari's F2008 is a car in constant evolution. At Barcelona, the barge board were again updated (see image). Previously, the diagonal edge was slightly shorter, while during winter testing there was only a vertical edge. Variations of this diagonal edge barge board was also seen at Red Bull and provides a means of combining the best of both worlds: jagged edged and straight edged barge boards.
I think these sharp corners spawn vortices that energize the boundary layer on the sidepod. This would help to keep the flow attached over the curvature of the sidepod and would feed more air to the rear of the car, either reducing drag or aiding with downforce generation.