iOS 5 released web designers a new property -webkit-overflow-scrolling:touch that uses the iOS devices hardware accelerator to provide native scrolling for a sc
I have run into this bug as well. I fixed it by applying the following css to parent elements:
-webkit-transform: translate3d(0, 0, 0);
However, I have noticed that that slows down rendering and might select other input elements than wanted when a touched input element is scrolled into the center of the view (by Safari/iOS).