Rails - Jun 2006 - JS / CSS ressource files and query strings for caching

Rails appends query strings to  ressource files for intelligent browser
caching (only updating browser cache when files get channged)

But this article (
http://www.thinkvitamin.com/features/webapps/serving-javascript-fast ) says
the following:

At this point, you might ask why we don''t just add a query string to
the end
of the resource - /css/main.css?v=4. According the letter of the HTTP
caching specification, user agents should *never* cache URLs with query
strings. While Internet Explorer and Firefox ignore this, Opera and Safari
don''t - to make sure all user agents can cache your resources, we need
to
keep query strings out of their URLs.


Any comments on this ?

regards
-- 
Roberto Saccon
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