Please read the Tutorials/FAQ about creating a custom template. You shouldn't be modifying anything in the /classic folders because those are included in all updates/upgrades of Zen Cart and your work will be overwritten.
If you want a jump start on creating a custom template, check out the free templates available by visiting http://(sorry, site offline)/. Use the pulldown menu to change templates and see what they look like on a live site.
Zen Cart is looking for your logo as ncludes/templates/classic/images/logo.gif and not finding it.
The green line is in the stylesheet:
Code:
.leftBoxContainer, .rightBoxContainer {
margin: 0em;
border: 1px solid #9a9a9a;
border-bottom: 5px solid #336633;
margin-top: 1.5em;
}
Edit: Steve (and his wonderful avatar) beat me to it!