In your logo template you have code:
background: url("../../../images/flame/header.png") repeat-x scroll left top rgb(117, 0, 0);
Change it to:
background: url("../../../images/flame/header.png") repeat-x scroll left top rgb(0, 0, 0);
Open your Themes -> choose your theme -> open global.css -> there you will find logo template
It has
#750000 url(images/flame/header.png) top left repeat-x
and
border-bottom: 1px solid #550000;
No. You are looking at the wrong template. I inspected your forum and i found in your logo template code which i writted before. Take a look again. Be sure you choosed right theme and template.
Checked everywhere mate can't find it
Can you choose Edit Stylesheet: Advanced Mode and after that search for #logo with CTRL + F on keyboard.
It says
#logo {
background: #750000 url(images/flame/header.png) top left repeat-x;
border-bottom: 1px solid #550000;
}
Try it like this:
#logo {
background: #000000 url(images/flame/header.png) top left repeat-x;
border-bottom: 1px solid #550000;
}