On the rear wing is the web address of environmental awareness website My Earth Dream, launching on 27 February 2007.
Barrichello finished the race in 11th place, with Button in 15th after receiving a drive-through penalty for speeding in the pit lane.
At Canada, Barrichello could have finished as high as 3rd but was again on the wrong strategy which required him to pit an extra time dropping him to 12th.
At the European Grand Prix, Jenson Button had had a strong first lap before the rain arrived and was up to 4th place before he aquaplaned off the circuit at the end of the pit straight, as did five other drivers.
At the next round in Belgium both drivers were running out of the points before Button retired with hydraulic issues, while Barrichello finished 13th.
In Shanghai, Button put on a remarkable display of driving in the wet and scored the RA107's best result of the season with a strong 5th place, finally moving Honda ahead of Super Aguri in the championship standings.