Adding a space above the forum category?

[Club3G]

(Obligatory "I just upgraded to 3.5.3 reference here, and apology if this is obvious

I'd like to have a space above each of the forum categories, showing the overall background image on the page (not a blank table).

For example:

http://www.sevenstring.org/forum/index.php

Above the "Music Discussion" category heading, I'd like a gap between that and the forum above it (Artist Reviews & Interviews).

Sounds simple, but i'm looking at forumhome and forumdisplay, and it looks like if I just add a couple of line breaks, it will extend that table.