Featured image not showing

I’m using Customizr v3.1.6

After setting a featured image, no image shows on the home page. I haven’t done much testing, but using firebug and chrome’s webdev tools I’ve found that the line that reads <img width=”1″ height=”1″ src=”src” class=”attachment-medium wp-post-image” alt=”alt”> needs to have the height and width removed. I haven’t looked at the theme css itself, but removing those two attributes using firebug suddenly displays my featured image. I will report back with my findings at a later time.