Well, I have yet to try the transparent gif image, mostly because, although it appears simple, I wasn't sure it was the most appropriate method to make this correction. If anyone else out there is still reviewing this thread, let me tell you what I have tried thus far:
I used web developer, under tools to isolate "logo.gif" in all files.
I then went to all but two of these references and anywhere there were image dimensions or the logo.gif within ''(quotes), I nulled them out by leaving the statements and removing anything between the ' 's.
In some cases I tried to "comment" these lines out, but then I would get text printed in the box, i.e. SALES_TEXT_HERE, or something similar.
I made changes in: p_h/zc/nddbc.html
p_h/zc/incl/lang/engl/classic/header.php
p_h/zc/admin/incl/lang/eng.php
p_h/zc/admin/server_info.php
p_h/zc/incl/lan/engl/header.php
I did not make changes in: public_html/zencart/admin/includes/footer.php because it indicated it was a footer document, and I am working with the header.
What this phantom image reminds me of is when an image has been defined in the code, but the image that is to be posted there is missing, or not defined. This is why I had nulled out all 'logo.gif' and image size specifications.
I am truely stumped now!!! Has anyone else got any new ideas?