I am using Vertigo. I am trying to remember how you put an "attribute" with the header image and have it so it will click through to your main blog page when you navigate away to another page. In other words, you navigate to another page and you can click the header image to return to the main page. Is that absent from this theme?
Also, you seem to have flexible header sizes and a page that addresses that but really doesn't tell you how it's done. http://en.support.wordpress.com/themes/custom-header-image/
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