I have too many visitors getting "404 Document Not Found"

[Preacher]

I seem to recall having an image call in a css for a background in some kind of element in my standard css template a long time ago. Every site I built off that template could not find the image and if memery serves - which it rarely does - that would produce a 404 in my stats yet not effect the look or load of the site built with that css template at all.

I hope that makes sense.