wp image gallery border styling

Not sure if this is a WP problem or ATA. http://pollymac.com/judyscolors.com/?page_id=225. I just want a simple gallery here. I'm getting a strange border around the images that I can't seem to get rid of. Using developer tools, I can uncheck the box next to #gallery-1 img {border: 2px solid #CFCFCF;} and the border disappears, but when I insert #gallery-1 img {border: none;}, nothing happens. I've tried lots of other inserts, but still can't figure it out. Thanks for any suggestions.