enigma1 - 12:55 pm on Apr 27, 2011 (gmt 0)

So you're saying it's the browser that downloads the CSS even if the user never visits? What would be a reliable way of testing if that's the case?

With the cache yes changing the stylesheet you should noticed it immediately, with the preview they take screenshots but when whatever browser is in use for rendering it will use the side scripts.

If you check the cached version does the page renders correctly?

PS: I would think is more complicated to store the various stylesheets. Instead they forward the request to a browser like system it takes a screenshot of the page.