Does this work in > iOS 5?
.element {
background: url(images/myImage.jpg) 50% 0 no-repeat fixed;
}
I thought that it should, but so far
According to this background-attachment support matrix, no.
Another post suggests that coming up with a workaround for mobile devices is not worth it:
...both Android and iPhone block timers or render during scroll, so the effect is that divs move with the scrolled page and only after, eventually, divs come back in the expected position. This is against position fixed idea