thumbnails alignment bug fix, see https://github.com/twitter/bootstrap/issues/3494

boostrap-bugfix.css

/* thumbnails alignment bug fix, see https://github.com/twitter/bootstrap/issues/3494 */
.row-fluid .thumbnails [class*="span"] {
    margin-left: 2.5641%;
}
.row-fluid .thumbnails [class*="span"]:first-child {
    margin-left: 2.5641%;
    margin-bottom: 0;
}
/*
>>> for n in range(1,13): m=12.0/n; print ".row-fluid .thumbnails span%d { width: %g%%;}" % (n,(100.0 - 2.5642*(m)) / m)
*/
.row-fluid .thumbnails .span1 { width: 5.76913%;}
.row-fluid .thumbnails .span2 { width: 14.1025%;}
.row-fluid .thumbnails .span3 { width: 22.4358%;}
.row-fluid .thumbnails .span4 { width: 30.7691%;}
.row-fluid .thumbnails .span5 { width: 39.1025%;}
.row-fluid .thumbnails .span6 { width: 47.4358%;}
.row-fluid .thumbnails .span7 { width: 55.7691%;}
.row-fluid .thumbnails .span8 { width: 64.1025%;}
.row-fluid .thumbnails .span9 { width: 72.4358%;}
.row-fluid .thumbnails .span10 { width: 80.7691%;}
.row-fluid .thumbnails .span11 { width: 89.1025%;}
.row-fluid .thumbnails .span12 { width: 97.4358%;}
@media (max-width: 768px) {
  .row-fluid .thumbnails [class*="span"] {
    display: block;
    float: left;
    width: 100%;
    min-height: 30px;
    margin-left: 2.564102564102564%;
    *margin-left: 2.5109110747408616%;
    -webkit-box-sizing: border-box;
       -moz-box-sizing: border-box;
            box-sizing: border-box;
  }
}