{{#linkClasses}}{{.}} {{/linkClasses}} is just short for {{#linkClasses}}{{linkClasses}} {{/linkClasses}}, right? 

It's kind of confusing using mixing the 2 styles here, and using all long-hand in atricleThumbnail.mustache. Maybe we could pick one style to make sure we're consistent? I'd vote for the long-hand way, since the dot short-hand doesn't look like it's covered in the official docs. It looks like you can do cool stuff with it, but for just rendering the current element in the array I'm not sure if it's needed here.