Cross Browser CSS post display problem

Hi There,
Im having a bit of an issue of how posts are being displayed between two browsers.
Im using -moz- and -webkit- column properties to split the content in to two contents

in Firefox it looks good: https://www.kindergarten.edu.hk/english_2011/wordpress/?page_id=299

however in Safari it gets funky, the title posts lags behind and ends up in the first column. In Chrome it goes all wrong and text overlays the pictures.

Any ideas?