id scrollView = [yourWebView.subviews objectAtIndex:0]; if( [scrollView respondsToSelector:@selector(setAllowsRubberBanding:)] ) { [scrollView performSelector:@selector(setAllowsRubberBanding:) withObject:NO]; }

It's not a real UIScrollView, therefore 'id'. And other UIScrollView action don't seem to work....

http://stackoverflow.com/questions/500761/stop-uiwebview-from-bouncing-vertically