splitting front seat covers

Hi. I've got a Lag 3 TomTom Dynamic bought new Oct 2010. I've just noticed that the leather on the two front seats is splitting on the outsides. What is obviously happening is when you sit on the seat the sides bulge out and on the outside edges of the seat the leather goes down behind plastic which has an edge facing in directly onto the leather so obviously with someone sitting in the seat there has been movement as the car has been driven and this movement has been chaffing the leather until it has split. The car is 3 and 1/2 years old and only done 27000 miles so I really think this is a bit of a design fault and really not good enough. Just wondering if anyone else has had this problem???

Cheers