Yeah ive tried a lot of different driver combinations. Im not the only one with the problem, far from it infact, about 50% of xfire/sli users are having the same problems however the other half have no problems running the same drivers, its truely bizzare. theres 30 page threads floating around various forums with no solutions in sight for the unfortunate 50%
no ingame patch is going to fix it. you have to uninstall your standard edition and reinstall limited edition (you get a key from EA New zealand, when you email them with a picture of your standard edition key and limited edition dvd). I havnt found time to reinstall it yet but have got my new key from EA.