Sticks101 on "[Plugin: NextGEN Gallery] need to modify padding or margin in thumb container"

I have used Firebug to try and find the CSS rule that will modify the height of the container and the thumbnail. I would think it's related to margin or padding but both top and bottom are set to 0. Any thoughts?
http://dev.speedwellforge.com/rooms/summer-kitchen?show=gallery

http://wordpress.org/extend/plugins/nextgen-gallery/