When we add new grafix to our sites, how to we make them secure so the won't disappear and become a box with a red 'x' on the secure pages? I have just added the GeoTrust graphic to my site and, ironically enough, it disappears into the dreaded square with the red 'x' when I enter my secure pages.

Make the image address relative.

For example, instead of http://www.mysite.com/images/picture.jpg, it should be /images/picture.jpg

Actually, even that image will not show up in checkout correctly -

This is because the leading /slash/ leads the browser to believe that it should look in the root directory, which, if you are using shared SSL, is not the root directory of your secure checkout. To make the image appear in checkout, use this -

Although in HTML, they are both technically 'relative' the proper method is the second one. I hope that helps!