Well, yes and no.
Yes, it’s because of how Genesis handles the logo image, but technically, the newer versions of the Appfinite themes could have been updated to use “custom-header” instead of “genesis-custom-header”, since SP also moved towards that with the introduction of Genesis 2.0 and their HTML5 Pro themes. Even with the most recent updates of some of their existing xhtml themes back in January, those are still using “genesis-custom-header”, but all of their HTML5 themes now use “custom-header” instead.
I wouldn’t have chosen to go so far as to insist that’s a bug, and get my blood pressure all out of whack about it (I save that for image handling and CPTs), but there you have it 🙂
