We're in the process of reducing the size of our images site wide. One big part of this is compressing the images in our navigation. A tool we've been using to help us do this is [[url removed, login to view]] This tool shows us the total size of all of the images on a page.
However, in the details, it is showing images on pages that aren't anywhere on the page, even when doing a view source. After looking into it, these images are preloaded in our css file. It was my understanding that they would only be loaded on pages that are using their div class.
Am I mistaken, or is the tool wrong? Please send me a PM and I will send you a link you can use from our website, and a copy of our css file.