Working on a client site here: http://mcveighcreative.com/biofab/
I'm thinking it has something to do with the css, because on a quick refresh I can see that the tiles do load their images. Can't seem to figure it out.
I have combed through most of the questions and have implemented this in the header
#gmap_canvas img{max-width:none!important;max-height: none;background:none!important}