extraneous css file request generated Something within my site is generating a request to a css file called "none". It is using the path of our theme. Our theme does not have any such style sheet called as part of our stylesheets array.

Our definition:

stylesheets[all][] = css/mods.css

stylesheets[all][] = css/main.css

request on page load:

/sites/all/themes/our_bootstrap/css/none

Since there is no such file, a 404 is served for that file. Where can I look to track down what is generating the request?
You may have something like url('none'); specified for a background (or list image, etc.) in your stylesheets.