Grid not working out

It seems like you have some extra margins set to the images. The grid only takes extra padding and borders into account for now, I’ll add margins to the equations in my next update. For now you can fix the issue changing line 1257 in your theme’s style.css file:

.art-article img, img.art-article, .art-block img, .art-footer img
{
   margin: 7px 7px 7px 7px; <---- remove this line
   padding: 7px;            <---- optionally, you can add this line, but you don't have to if everything else keeps looking nice.
}

The path to the file is wp-content/themes/Kashi5/style.css

Hope this helps.

Thank you very much, Jules!

Again, great plugin!