I just uploaded my first image to the plugin and in the listing the image (horizontal, 600x400), is not displaying the thumbnail size, it's displaying a scaled down rectangular image. The search results also show this non-thumbnail version (image does not fill the square). When I click the thumbnail on the listing page, a smaller version of the image shows up in the lightbox, not the 600x400 size.
Any suggestions? You can see what I'm talking about in an image HERE