Comment on WordPress Header Images by SEO Dave.

WordPress Custom Header Options If “Activate Stallion 2011 Header Area” is unticked yes, the two settings you listed are independent of this setting.

You can have both header areas on, but this doubles up your site title and looks terrible.

Sounds like you might be turning a feature on which adds the header options page, then turn it off and still trying to load the header options page?

David