When I style my img (specifically, the image in the left green column), all of a sudden I get a gap directly above my navigation panel. I've deleted and tried redoing, and I don't know how to get rid of the gap. I likely need someone to tell me how to correctly style that left graphic. Trying to float it left with some right padding. http://www.duenorthdesign.com/christmas/index2.html
try adding to your css
You'll need to add...
To those 3 images within the #header <div>, and add...
to the #header itself to keep it from collapsing.