No luck @Paulie_D. @HugoGiraudel, it’s idd the old syntax that’s the problem. Only supporting new syntax halves the browser support though. I was going to implement a float fallback (can’t replicate exactly what I’m after but can come close) for browsers that don’t support flexbox anyway (using Modernizr). I’ll just have to figure out if I want to give the old flexbox supporting browsers the float treatment too, or go with the extra wrapper.