I've been using the HTML5 Boilerplate for some web projects for a while now and have noticed the following issue cropping up on some sites.

My CSS and JS files, when loaded by the browser, are being renamed to things like:


…in the case of modernizr-1.7.min.js

The pattern always seems to add ce. or cc. in front of the filename. I'm not sure what's causing this, and it's frustrating since when I make updates to those files, the same old cached file is being loaded. I have to explicitly call modernizr-1.7.min.js?v=2 or something similar to get it to re-cache. I'd like to scrap it altogether but it still happens even when .htaccess is empty. Any ideas? Is anyone else experiencing this issue?

  • are you using the build script?
    – Gerben
    Jun 21, 2011 at 19:58
  • Is this all browsers, or one in particular? Jun 22, 2011 at 11:52
  • Are you using any extensions that mess with JS or CSS files? I know some of the CSS Reload extensions will 'overwrite' previous versions of CSS files in-memory with renamed versions like this.
    – Mufasa
    Jun 23, 2011 at 21:24

1 Answer 1


Going by the accepted answer to this question, do you have mod_pagespeed enabled on your server?

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