Tell me about it. If you've ever used iScroll (amazing library btw https://github.com/cubiq/iscroll) to get iPad scrolling support you'll see how deep the rabbit hole goes. I initially used it for 2013.artsy.net (source code: https://github.com/artsy/artsy-2013) and had to eventually decide to toggle it on only for iPad b/c there were too many edge cases in the browser.
But I digress. Thanks for pointing this out, hopefully we'll eventually smooth over the quirks to a reasonable degree. Logged the bug for now: https://github.com/artsy/scroll-frame/issues/12