've customized the header area of my blog
. This involved cropping the bottom bar of the image that comprises the header. The problem is the cropped part of the header doesn't want to go away. I've eliminated, or at least hidden, the excess in the section immediately above the post area but haven't been able to eliminate the excess on the sections on the left and the right of the blog, which I've marked with red arrows in the screenshot below. I know that the background wrapper code controls these but don't know how to modify it to make the height of the blue bar uniform.
The blog template code is attached.