still bug with multiple "+" CSS selectors in Mac/iOS Safari 8.0 - it's fixed in nightly 10600.1.25.1, r175941, so the next version of iOS8.1 can't come fast enough!
Fork of the spread of cards layout, removing the calc() measurements in transitions to fix the animation in IE10+ (IE doesn't like mixing calc and transition).
It's removed the gutters around the cards, but if you're not afraid of nesting more mark-up, that's easily solved with an element inslide the <LI>s.