Scrolling the page with mousewheel/multitouch doesn't work unless the pointer is inside the white area

...appears it's been fixed since my original comment. There's still no scrollbar in the expected place on the side of my browser window though.

It's still broken. It seems to use JS to scroll when outside the white area, but this has a different effect from native browser scrolling. On my device the native scroll is smooth but the fake one is immediate and jumps further on each scroll.