My LJ header disappeared when I changed to S1 (following the layout creator's instructions)! I cannot find the "Manage>>Info" on LJ at all! The layout I chose is this & my blog on LJ is this.
If you follow that link, that's where you'll see a field that says "Webpage URL" - put a link to something in that field and you should see your header image.
This is a "lo-fi" version of our main content. To view the full version with more information, formatting and images, please click here.