Same problem, lost a few hours of my saturday too :@
Luckily, the problem seems to be this bit of css in the foundations.css file, which conflicts with the style.css of Onetone theme (that’s what i’m using)
/* Grid HTML Classes */
.row {
width: 100%;
margin-left: auto;
margin-right: auto;
margin-top: 0;
margin-bottom: 0;
max-width: 62.5em;
*zoom: 1; }
I commented this block out, and my layout got working again! Hope it helps