I wanted to make a small adjustment: to make the header image a link to the home page instead of the text site title.
In other themes (e.g. twenty10/11) this is simply done by inserting an img tag calling the specified header image in header.php
In your theme, the header image seems to be already inserted as a background img, defined in the styling of #site-content in functions.php – then the text of the site title is made a link in header.php.
If I simply replace the get_title() call with get_header_image() .. I get the image twice, which isn’t ideal.