[Plugin: W3 Total Cache] CDN url replacement does not work properly

Hi,
I’m using the latest developer version of W3 Total Cache with Rackspace CloudFiles as my CDN provider. I’ve checked multiple times and my minified CSS and Javascript files load from my CDN, but images defined in these files still load from my main server. The images are present in the container and they appear when I type in files.mydomain.com manually. Note that it works great with post contents like mp3s and pictures, they all point to the CDN, it’s the minified CSS files that fail to replace urls.

Any idea on how to fix this?

Regards
redlips