Here's the blog (culprit).
All I'm trying to do is click-a-fy my Logo, to resolve to the main page. Simple right? Um, not really, because my header.php is being a bully and SO not playing nice with the Codex. Unlike most themes, there is no reference to my Logo image file in the header.
The relative part of my style.css is here. There, you'll see the parameters of the Logo.
How is the world can this be done?