Customization of Smugmug.com Site

If you go to [login to view URL] and then click on "competitions" (or any of the other categories), you will see that the two rows of thumbnails show up... but what I do not like is so much white space between the top row and the bottom row. I have searched all the smugmug support forums for advice, but I could not find any fix for this. I want the second row to be quite a bit closer to the top row, if that makes sense. These galleries also use style sheets so I am sure it is about finding the right CSS code and fixing it. Thanks and regards Nico Conradie