On two different WP installs on the same server, when I install the SM Gallery plugin and create a page with the [gallery] shortcode, then attach pictures, the thumbnails show up, but the main picture window does not.
I have used this plugin on a different server and it worked fine (very easy!) so Im pretty sure I am doing it right.
The server is Centos 6. I suspect I am just missing some small piece, but I dont know what!
You can see the problem at http://blog.starlilyth.net/pics/