iOS Safari scroll to top does not work on certain pages. Why?

Question

Disclaimer: The site has meanwhile been updated, this issue does not occur anymore with the new version of the design.

On a new site I built I noti

Answer 1

-webkit-overflow-scrolling:touch is the problem. If you use that anywhere in your CSS, the scroll-to-top shortcut stops working. This is a known problem with iOS 5, there is no workaround unfortunately. Hopefully it will be fixed in iOS 6.