I love this theme. But I think SEO wise, it's better to have 1 or 2 at most h1 tags in the main page. This theme has all post titles as h1 tags and I always have to modify the content.php file with every update.
And the "older posts" link shouldn't be an h1. I change it to h3 actually.
Not complaining, I love the theme :) ... But just making a note for the next release. Correct me if I'm wrong!