I currently develop a website in mobile safari. I am stuck on a problem that the text shadow behavior in iOS5 and iOS4 is completely different such as the blue effect. And the result of text shadow position is also different between iPhone 3G (non-retina) with iOS5 and iPhone 4 (retina) with iOS5. CSS code is "text-shadow: 0 1px 1px #ffffff". Can someone tell me how to fix this issue?