Comment 16 for bug 1690780

Seth, I think you mean lp:#1562173. The bounce effect was due to WX_VIEW_CONTROLS::onScroll() being invoked too many times, both for wxEVT_SCROLLWIN_PAGEUP/DOWN and wxEVT_SCROLLWIN_LINEUP/DOWN.
Git log for common/view/wx_view_controls.cpp shows that it is not easy to get the event handlers right. Perhaps we need some #ifdefs there, as the bounce occurred only on Windows.