backface-visibility non-interoperability demos
card-flip-demo.html
A card-flip demo that shows multiple interoperability problems with backface-visibility and thus behaves differently in different browsers.
card-flip-demo-noprefix.html
A version of the previous demo without -webkit-backface-visibility so that it shows even more differences between browsers.
card-flip-demo-working.html
The working version of the demo written to avoid the interoperability problems instead of showing them.