I use S3/Cloudfront to store my assets, how would I make it so that Rack offline uses S3 to pull assets for caching?
Zacksiri, this is not an rack-offline issue. The Same-origin policy prevents this. So the browser won't download the files. http://en.wikipedia.org/wiki/Same-origin_policy. If you use the http instead of SSL for your images, it should work.