Hi Brent

You've misdiagnosed this slightly. It's nothing to do with the image file type - it's how it's linked into your site. And it's not somehting that you've done

Your logo.gif is displayed because it is a image in the page's HTML. It's pulled down, renamed and placed in your browser cache in a way that Web Developer understands.

Your header.jpg is a background reference referenced by your CSS with a path name. Web Developer goes looking for a image on that path, but unfortunately it's a relative path and Web Developer doesn't know the structure of your site and can only apply relative links relative to the page and not the original location of the file providing the relative link.

This has been taxing the brain of Web Developer's Author, Chris Pederick, for at least two years and I am not aware of an end in sight (no pun intended ). However, you can work around this if you want by creating a directory called images at the same level as your site's root directory and putting copies of your background images in there.