I don't understand the following:
In Drupal 7's default .htaccess file the Apache module
mod_expires is ordered to let files without a .php extension expire after two weeks.
How is web development with this setting possible? When I change a .css file, I want the changes to be reflected immediately. Do browsers ignore the expiration setting?
I've stumbled upon this issue because I'm currently experiencing troubles with a Varnish caching system. I currently do not know what causes my files not to be refreshed immediately.