Must admit i've only noticed it once, its like you've put the car in 5th gear instead of 3rd from 2nd!
LM's in the for sale section were 18'' and are sold...
ah bummer must admit i did not read the advert just spotted them.
i have got used the stutter now so drive around it... on mine its only if your cruising around 1900rpm and then accelerate (say to overtake on a motorway) there is the stutter then the car goes. SEAT say they can not cure it so i just live with it.