[Plugin: Related Posts Thumbnails] Post titles closer to the thumbnail images

I’m using this plugin and loving it, but I have one question.
How can I put the titles of the posts closer to the thumbnails?
I’m using it over here: j a n m a r c e l . com

There’s so much space between the titles and the thumbnails..
I’m using the tags in my css but I can’t find the line to change this space..

Thanks in advance!

http://wordpress.org/extend/plugins/related-posts-thumbnails/