I’m not sure what I’m doing wrong: http://colbyblogs.org/wptest/custom-post-types/shortcode/
On this page I’m using a plugin called CSS & Javascript Toolbox to inject PHP code on my page, if you look at the source code the img tag isn’t working right with the code I took from your help pages:
<img src="<?php the_field('field_name'); ?>" alt="" />