Blurry images

Hey,

I love the plugin I’ve had it for about a year. I recently added a couple of new images to the gallery and they are appearing blurry as if the resolution isn’t high enough, however when I click on them and they open in a new web page I can see that they are fine. Would you be able to offer any solutions to this? http://www.antheaandlyndon.com/photography

Thanks 🙂

http://wordpress.org/plugins/responsive-gallery-grid/