Now the light line is gone but there's a different colour gap to the one above. You need to use the same colour otherwise they look like 2 different blocks.
Or remove it altogether
And if you wanted to go a step further it'd look better if it was lighter, as the banner would dictate a light source directly in front and the lighting of the top and bottom nav boxes is darker instead of lighter.
Edit: and it would be nice if clicking on an image that's in TN tags opens in a new tab. Just add target="_blank" to the <a> tag element in your bbcode editor.