apparently the design in their new car is some what different to others n appears to give them an advantage in the straights.. why r mclaren always involved in controversy?

This is Formula One racing, whenever some one comes up with innovative technology other teams get angry. In this instance, the technology is within the rules and has been clarified by the FIA. This is not controversial, it gives an extra 4-5mph on the straights and 2 tenths off a laptime. Because this advantage is not as big as the double diffuser used by Brawn at the start of last year, teams are not appealing the decision by the FIA.