Two finger left/right swipe not working with Migration Assistant

I have a new MBA, I used Migration Assistant to move accross all my old stuff (Snow Leopard) on to the new computer which has Lion.

My two finger left and right swipe doesn't work though. It doesn't work in Safari, iPhoto or iCal. With Safari it does a sort of jerky flick back to the previous page and with iPhoto and iCal it simply does nothing. I also still have the scroll bars visible which I think is supposed to be a thing of the past too.

I have been three times to the Genius bar in Belfast and once to the one in Pasadena, CA but noone can fix it. They have tried reinstalling Lion, removing everything and starting from scratch and then removing everything and opting not to migrate my settings when using Migration Assistant.

I want to stress that it seems to be a problem with the Migration because if I create a new user the two finger swipe works perfectly. It is only me.

What is there on my old settings that Lion can't understand? Help!