It’s because of using the `display:table` to vertically center the content… which needs height set to 100%. The equalizer script doesn’t expect the height of an element that it adds to be set to 100%.
@Mottie, I don’t know why my [Fiddle](http://jsfiddle.net/Fatbat/2HRB7/ “Fiddle”) isn’t working, but it works perfectly on my test site. I’ve not had any problems with the older version of Equalizer, it even equalizes divs more than one layer below the outer wrapper which is better, but of course it’s not responsive :(