[Plugin: Flash Gallery] Thumbnails have no border

Hey everyone. I’m having some trouble with my flash gallery. Basically, I’m trying to get it so that my thumbnails have a border around them. Right now they are all touching in some manner, with some overlapping over thumbnails:
https://www.iwasinvancouver.com/media/

I’m trying to get it to look nice and pretty like this example:
https://game.hgo.se/blog/gotland-game-awards-2009/

Any idea on how I can make that work?