title: IE11: overflow: hidden doesn't work
body: <p>It's not the IE6 bug of <code>position: relative</code> mentioned <a href="https://stackoverflow.com/questions/2403011/ie6-ie7-css-problem-with-overflow-hidden-position-relative-combo">here</a>, and I couldn't figure out why. When the child div animates beyond its parent's border some part of it still flickers for a split second before disappearing properly.</p>