mikedragonetti on "I'm getting gaps in my original theme"

Hi,
I'm new to blogging, and I could sure use some help!

First, here's the blog in question:

http://thedailyfishonline.com/wordpress/

I'm getting these "gaps" either on the main content or the sidebar. I could've sworn I put the background color I want everywhere in the CSS templates.

I also tried to get into the support forum, and that doesn't work for me either. There's also no one to contact about that issue.

Any help (a tutorial of sorts would be quite appreciated!

Thanks!

Mike