OK I found this at another forum:- in templates/rt_versatility4_j15/ folder, open rt_head_includes.php, then delete this line:
<script type="text/javascript" src="<?php echo $this->baseurl; ?>/templates/<?php echo $this->template?>/js/roksameheight.js"></script>
#maincol .main-height {border-right:1px solid #ddd;border-left:1px solid #ddd;}
But this still does not solve the problem I get after disabling the roksameheight.js. The User modules (specifically User modules 1,2, and 3 on the front page) do not hold the same height. Is there a way to target them with the js and nothing else?