Quick and dirty way to find DOM elements that are breaking your vertical baseline grid.

baseline_tattler.js

$('div,p,section,header,footer,ul,ol,li').each(function(){
  var h, el, baseline;
  
  el = $(this);
  height = el.outerHeight();
  baseline = 13;
  
  if (Math.round(height) % baseline > 0) {
    el.addClass('boink');
    console.log( height, this );
  }
});