Hi Barry,
I found this is working for me quite well now…
.rp4wp-related-posts ul {column-count:2; -moz-column-count: 2; -moz-column-gap: 20px; -webkit-column-count: 2; -webkit-column-gap: 20px; -moz-column-rule-color: #ccc; -moz-column-rule-style: solid; -moz-column-rule-width: 1px; -webkit-column-rule-color: #ccc; -webkit-column-rule-style: solid ; -webkit-column-rule-width: 1px;}
.rp4wp-related-posts h3 {margin:0;padding-bottom:5px:0;font-family: 'Raleway',sans-serif;font-size:16px;font-type:bold;}
.rp4wp-related-posts li {list-style:none;padding-bottom:0px; height:240px; min-height: 240px; overflow:hidden;}
.rp4wp-related-posts li p {margin:0;padding:0;}
.rp4wp-related-post-image{width:80px;height:auto; border:1px;padding-right:8px;-moz-box-sizing: border-box;-webkit-box-sizing: border-box;box-sizing: border-box;float:left;}
Please feel free to share this along with your plugin for interested people.
This requires 4 related linked posts. I have set the Excerpt length to 50.
I tested it on Safari, Chrome, FireFox, Opera, SeaMonkey and an iPad, iPhone and Nexus and all looked good so far.
Cheers
Yogie